I dunno about you guys but I'm just hoping I can find a mother fuckin' vein once I score tomorrow

Any IV pro/vets got any pointers? I've ruined all the big ones in my hands now. (not from poor technique) Shooting k crystal just eats the veins

Wrists, forearms, crook, bicep ones all gone. I may have the ones on the outer elbow left, although I've never managed to even feel the one on the left, and my right elbow is massively swollen atm from a scrap (the other guys face is more swollen lol)
I'm going to have to use my feet I guess. Massive veins down there and in the ankles, I have tried to hit them before but not very hard. Never managed to hit my legs either. If I can't get them then what options do I have? Neck and groin?

Defo don't want to start having marks/tracks/bruises and/or collapsing neck ones. I've got a friend who goes in the groin all the time but recommendeds against it as he's got 'holes either side of his dick' now :/
Also if like to be able to hit a vein big enough to accept an orange head. The feet ones look like they'll probably only take 1mls and I can barely get enough in a 1ml for a decent hit