Since you asked nicely…..
I
never do this, but I took a quick video of me with a few of my favorite players. Unedited, with dog barks and buzzy pickups and everything - how unprofessional…..
All of these have slippery nylon/seatbelt straps, except the last one, which has a slick (not grippy) leather strap.
1. My home built Rick-alike. 33” scale, upper strap button between the 12th and 23th fret. Settles just above horizontal.
2. My EB333 - an Epiphone EB0 body with a homemade 33” scale neck. Hipshot Ultralites with an Xtender. Strap button on the neck heel. Settles just below horizontal. Not ideal, but perfectly manageable, and the EMGs sound great.
3. 198X Peavey Foundation with a homemade 34” scale headless neck. Stays put! Headless is a game-changer.
4. My homemade five-string multiscale 32”-34” headless Rick-alike. Stays put!
5. My homemade Ripper-shaped 10-string. 32” scale, Hipshot Ultralites, strap button at the 14th fret. Settles just north of horizontal.