[WSSix]

I have Kore3 billet hubs and screw in studs on the front of my TA. You just need the studs to be torqued enough that they won't back out when you screw the lug nuts on. You should be using a lubricant with the lug nuts. It doesn't take a lot of torque to keep the studs in place.

As for screw in versus press in studs on the adapters, I have press in on my adapters. I only have a 3/4" adapter on all four corners. There's not enough meat there to have recessed screw in studs. I would check with ARP about how much thread you need to have to be safe. A general rule of thumb is to have as much thread as you have diameter. You may need more than that in this case though.

Good luck.