My school is getting its nice new permeant set-up, and I am so excited!!! Here is the plan so far: 22 ETC Source 4 19' 575 watt lights 6 ETC Source 4 26' 575 watt lights 6 ETC Source 4 36' 575 watt lights 6 ETC Source 4 50' 575 watt lights 20 Source Four PAR 575 watt with complete lens kit (NSP, MFL, WFL) 1 24 x 2.4kw rack (dimmer) 1 12 x 2.4 kw rack (dimmer) cables (I won't bore everyone by talking about that) 20 7.5" Short Snoot Top Hats for S4/PAR 10 "A" Size Source Four template holders 10 Source Four Donuts and to top it all off an ETC Express 125!!! (all of this will be used of corse. an electrician is going to look over/fix all of the lights that we are getting) OK, so questions: whats the difference between a donut and a template holder??? Any helpful hints with all of this stuff. I've only worked with my school's 12 Fresnels so far, so all of this stuff is new, and its coming in 1 week before the big musical goes up, so..... and lastly: what helpful hints do you have to the light board. I've never worked with a real light board (I don't conceder our little american DJ board to be a real board....). I downloaded the manual but its 350 pages long, and i don't have enough time to read it, so any helpful hints for that? I'm most worried/excited about this, since I have never acutely worked a nice light board, and this seems to be a very nice light board.