For those who have PM'd me and asked about my tube PE method (I hope this is OK) I direct you to PEGym. My name over there is Diamondback and I give extensive description/instruction in old threads and replies before I joined LPSG. In a nutshell the tube is just a piece of vinyl tubing from Home Depot cut to length and contoured and smoothed a bit. The process of getting in and out is involved.
When I first developed this method I had pumped (now 40 years) and had practiced hanging (up to 20lbs if I remember) for several months. I stumbled onto the tube "method" while trying to develop a new kind of hanger. After experimenting with many kinds of tubes and hoses made out of all kinds of materials, including steel, I settled on vinyl. The initial effects were startling, especially flaccid, I think I gained .75" in length and maybe .5" in girth over the first two months. Then with 7" flaccid as a goal I hit a wall at about 6.85" or something like that and it stayed there for years. Only recently have I reached 7" with almost (5.999 or so) 6" girth. When I first came up with the tube method I thought it was going to be a money maker for me but soon realized it was too involved with too many real safety issues. Most of the comments I get are that it looks painful, well, it's not painful for me, and it's safe for me and as of this writing I'm crossing the 7X6" flaccid barrier.