cave fill

Hey guys, I used to manage a dive shop in upstate NY and I would routinely pump up my LP Fabers to 3k or more depending on the dive. I now live in South Florida and all the standard local shops have a stroke if I ask for 3k... I really like my 108s but if I can't get them pumped up past...

I have a friend who is willing to sell me some PST MP72s cheap and I was wondering if they would make me head heavy when doubled. Feel free to post pictures of your short doubles. I've not been able to find pictures of short doubles online. Here's some information on these cylinders... Diameter...