1st issue - I have never adjusted a carb idle using the choke/enrichener as a guide. Ian's method is probably the best way.
2nd issue - If he really had to screw out the idle mixture screws (pilot screws) 7 turns, there is something wrong with his pilot jets/circuit. Either they are partially blocked or way too small.
3rd issue - The bike is already equipped with a headlight cutout relay when starting. No need to take the low beam out. I think, because he is installing an HID bulb which usually only has one light circuit (there isn't a low and high beam), he feels the low beam wiring isn't needed?????? I would never use an HID bulb with only 1 light circuit. HID bulbs often use a solenoid to move the filament forward/back to give low/high beam illusion. If the bulb fails, low and high are both lost instantly, leaving you in the dark. Also, HID bulbs in a "stock" reflector put more light into the heavens than on the road blinding oncoming traffic.