i just tested out my home made spear gun for the first time today. i was having quite a few problems loading the gun. my gun kept slipping down my chest when i put to much pressure on the bands. this was partial solved by putting a wetsuit vest on. but it still slipped a few times. i have a pretty long gun (53 inches) and i am having trouble bracing it on my chest. I got some pretty bad bruses from loading it today and tips or a modification i can do to my gun the make the loading easer.