Yup.........this is the best way to do it. It'll work. Your fingers are too soft to really push hard on the ring when it's tight like that.
Etek 3LT grey/black f/s
Valken Proton greyish/black f/s
68 4500 PE stubby, LP output f/s
68 4500 AIR tank(no reg) f/s
Creed Battery, eyes and noid f/s