hey guys
just chucked my new discs on the front
just wondering with the bleed screws on the caliper
theres a nipple and that undoes out of a bigger union which connects
to the caliper
when bleeding should i undo just the nipple or the bigger screw as well?

What sort or calipers have you got? And just to check, have you put them on so the bleed nipple faces up (some have put the LH on the RH etc ). Just bleeding from the nipple should be all that you need do.

i bought full disc assemblies from minisport so theres only one way the can go on and theyre minisport calipers. its braking alright just a bit spongy want to get them perfect. didnt spend 1300 on nothing

The pedal may be a bit spongy until the pad bed in.