lol mate i'm in exactly the same boat with my Stako,
from what i've read, Throttle regs arent meant to be all that, though i've never used one myself to find out.
Lips only have 1 dust black cp reg in stock but are getting more in a couple of wks, cp regs are meant to be very good quality and pretty light.
personaly, i'm gonna get a Guerilla 'Air Assault' from Amppaintball. Their out of stock at the moment but they can order one in for you for a £25 deposit. Their a fiver cheaper (not much i know) but their a tad lighter and 1 on the best regs on the market.
cheers