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  1. tbone1004

    Buying new vs used - pros & cons?

    Likely not allowed during training by the agency as it is not a factory configuration. Aftermarket sure. Also I do not like hardwired anything into the rebreathers as it requires the whole computer to be sent off if any corrosion comes up the cables vs replacing the stub connector. Less bad with...
  2. tbone1004

    Buying new vs used - pros & cons?

    Now that I think about it, I don't think there are actually 10 units that I would look at unless you count all the variants but it's all about what configuration works for you since that is the limiting factor. KISS only shows up on the list for very specific needs for sidemount breathers.
  3. tbone1004

    Buying new vs used - pros & cons?

    There is a lot to be said about training with different instructors to get different perspective.... The backmount O2ptima with BMCL/iBOV is anything but big and bulky. Weight is also largely dependent on which bottles you go with. If you go with 2l AL13's then it's about 15lbs heavier than the...
  4. tbone1004

    Buying new vs used - pros & cons?

    If you're leaning new I would strongly urge you to look at other options on the market.... The Spirit wouldn't even be on my top 10 list
  5. tbone1004

    CCR trained… still diving OC?

    I'm in the mission-specific camp, but backwards from what most people think of when they hear that phrase. Typically with people that talk about mission-specific use of sidemount or CCR, their default is doubles and they will choose sidemount when it's needed or choose CCR when it's needed. I'm...
  6. tbone1004

    Buying new vs used - pros & cons?

    similar with buying used regulators, if you know what you're doing, can DIY any repairs, and the price differential between units is pretty wide, then buy used. If not, then buy new. I don't like the Spirit personally as it has all of the issues of a sidemount and backmount unit, and isn't...
  7. tbone1004

    Used Poseidon 1st + 2nd for $100? (for pony bottle)

    could have been to force the exhaust bubbles out, but I've never seen it before
  8. tbone1004

    when is it time to replace a SAFT battery?

    same technology is in all of the rechargeable dive computers, so Teric, Peregrine, and NERD from Shearwater. NiMH has been more than reliable enough once the the Panasonics came out. If you go with 14500's, it will share a charger with the Nitecores...
  9. tbone1004

    Used Poseidon 1st + 2nd for $100? (for pony bottle)

    vinegar is good if it has salt buildup, diluted down quite a bit depending on how powerful the US is. No need for crazy acids IMO
  10. tbone1004

    Used Poseidon 1st + 2nd for $100? (for pony bottle)

    the tool certainly helps to get those unstuck, but if it's free which it obviously is, then it's not critical. You can diagnose more effectively by removing the diaphragm and cover and see if it seals. If it seals, then it's either the diaphragm itself or the needle valve, if not, then it could...
  11. tbone1004

    when is it time to replace a SAFT battery?

    @NothingClever why not just get the rechargable 14500 that is known to work?
  12. tbone1004

    Used Poseidon 1st + 2nd for $100? (for pony bottle)

    best to just get the tool, the one from Scuba Clinic is fine. Post pictures of what you took apart, my brain isn't firing on all cylinders this morning
  13. tbone1004

    DIR- GUE Min Gas... LP108 vs HP130

    to be precise, @rjack321 is correct and assuming both are Fabers, they are identical in internal volume and as such are identical tank factors and will always hold the same volume of gas when filled to the same pressure, regardless of what that pressure is... No one wants to remember the...
  14. tbone1004

    LP50s Modular Valves required?

    yeah that is surprising considering Edd uses them on all the LP50's he's moving for the Sidewinder... Someone must have been confused
  15. tbone1004

    Determining Minimum Wing Lift

    wetsuits are roughly 2lbs/mm of positive buoyancy, it's a good rule of thumb. Assume they have 0 residual buoyancy, then add mass of the gas in the tank, and I like to add about 15lbs so you can comfortably float at the surface at the start of the dive. Gets close
  16. tbone1004

    Piston or diaphragm 1st stage ?

    how is it you're correlating my dislike of piston regulators to Atomic being bought out by Huish? My dislike of Atomic is primarily rooted in them mismanaged by Huish, but my dislike of piston regulators is rooted in their inability to be sealed as effectively or efficiently as diaphragm...
  17. tbone1004

    LP50s Modular Valves required?

    @Manatee Diver @Bobby definitely makes bungees for LP50's, they're on the website as 5.5" tanks. On the valve side, the righty valves aren't ideal especially if they don't have a post on the end, i.e. normal manifold valves, so I would keep an eye out for them but nothing you can't work...
  18. tbone1004

    Piston or diaphragm 1st stage ?

    so to follow up on what @lowwall said, the environment seals would keep water out of the spring chambers. Where you see the gap in the body is where you would have the seals. On the pistons, where the water is, is replaced by lubricant and a band is applied around the holes to keep the lubricant...
  19. tbone1004

    Piston or diaphragm 1st stage ?

    sealed pistons when sealed with grease a la Atomic are idiotic. Pain in the butt to clean for the techs, and expensive to pack because the cost of the grease is stupid. Scubapro engineered around it for cold water, Atomic couldn't be bothered. Remember also that these seals were done for cold...
  20. tbone1004

    Piston or diaphragm 1st stage ?

    the majority of rental regulators out there are probably unsealed piston regulators because they're so cheap. If you are buying your own gear, I would strongly recommend sealed diaphragms because the risk of issues if you don't clean them off is pretty minimal. If I only dove in the salty stuff...
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