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Thinking of doubling up my HP80s

Discussion in 'Tanks, Valves and Bands' started by Marie13, Nov 11, 2018.

  1. Mike1967

    Mike1967 Manta Ray

    # of Dives: 50 - 99
    Location: Victoria, Australia
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    Maybe that's because you were so slow in SM, not that you're that fast now?
     
  2. Compressor

    Compressor ScubaBoard Supporter Staff Member ScubaBoard Supporter

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    Why make such a comment?
     
    noj3333 likes this.
  3. Mike1967

    Mike1967 Manta Ray

    # of Dives: 50 - 99
    Location: Victoria, Australia
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    It was a question not a comment.
     
    Compressor likes this.
  4. Caveeagle

    Caveeagle Rebreather Pilot

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    Location: High Springs, FL
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    I dive around a lot of BM and SM divers. It’s pretty darn rare to find a SM diver who Is faster to Be “ready to go” than a BM diver of similar experience.

    Sure there are exceptions...

    Lately, I have been about 50/50 when diving open circuit. ....and keep in mind that every CCR is also a SM Dive with twin LP50s. So, I get plenty of practice.

    Speed is hardly my primary concern, but I am still faster in my BM doubles.
     
  5. Marie13

    Marie13 Great Lakes Mermaid ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Great Lakes
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    If things go well, I’m planning on doubling up another pair of my HP80s. The band issue is a problem. They’re too short to keep the 11” bolt spacing with the currently available bands (2.5”, I believe). The thinner bands I used are 1980s vintage and were bought used from a friend who only had one set. I was able to keep the 11” spacing with the thin bands.

    I have two options I’m aware of. Use the currently available bands and have someone drill a hole in my plate for 10” spacing. The friend I bought skinny bands from has done that for other people. The other option is what @RyanT did - use 7.25” bands for top and 8” for the bottom, OVER the boots left on tanks. He said it was very stable. My current doubles do NOT have boots on them. Go look at the pics I’ve posted if you need confirmation.

    Is there any other option I’m not aware of? I’d prefer to not to do option 2.

    Edited for clarification since some people post knee jerk responses without reading entire post.
     
  6. MaxBottomtime

    MaxBottomtime Divemaster

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  7. Marie13

    Marie13 Great Lakes Mermaid ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Great Lakes
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    I’d suggest you look at the pictures I posted from yesterday’s pool dive and read my post again. Do you see boots on the tanks I was diving? Nope.

    Again, HP80s WITHOUT boots are too short to use the currently available width bands and still maintain 11” bolt spacing.
     
  8. KenGordon

    KenGordon Rebreather Pilot

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    Drill the holes in the BP. I had to take boots off the cylinders when borrowing a set and failing to realise I ought to ave borrowed the BP too, then I needed to remove the boots and move the bands. Then I had to sort the whole mess out before giving them back.

    BTW, less trendy backplates may have more holes.
     
  9. Marie13

    Marie13 Great Lakes Mermaid ScubaBoard Supporter

    # of Dives: 200 - 499
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    That short plate is a game changer for me and a number of other short women I’ve encountered online. Trendy? Don’t think so. Why should we have to put up with gear that doesn’t fit very well?
     
  10. MaxBottomtime

    MaxBottomtime Divemaster

    # of Dives: 1,000 - 2,499
    Location: Torrance, CA
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    e147e285-933e-4879-ab05-f212f9f88a98-jpeg.493711.jpg
    There is still room to lower the bands. If the other bands are too wide, use one wide and one narrow band on each set.
     
    Compressor likes this.

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