New bottle on reg?

[Lug_n_trug]

I just got an angel air setup (the barb-wire limited edition tank) but I am from Canada, and it has no TC.

I want to put a new bottle on, and I have a maxflow bottle that I am going to use.
I screwed off the angel tank, and I have the other bottle ready.

DO I JUST SCREW THE OTHER ONE ON AS TIGHT AS I CAN BY HAND? It won't fly off when I gas it up? :watchout: Do I need to use any grease or anything on the reg threads? There was something on the reg threads before, should I clean them off?

Thanks a lot if you can help!

[Emmit]

you can put any bottle you want to on the reg.

nope, don't need to do anything.

and yes only hand tight.