I tell insta buddies I'll donate the primary. If they think they might grab one of my regs, they need to find another person to dive with. And work on their gas planning.When rec diving, I've found that a long hose wrap around setup is more trouble than it's worth and just causes confusion. If I get an istabuddy, I need to explain how it works. If I just go off on my own, I don't care how long the hose is. 40" under arm is fine. I put an orange hose on my primary, that way I can tell instabuddies to "grab the orange" if they're OOA.