So for the new theater since I'm spending state money if I want a specific product it either must be a completely unique product or I have to specify a set of specific functional features that will result in the products I want. So I'm trying to create a list of unique FUNCTIONAL features to specify that set apart the three instruments below from the competition so that I don't get stuck with a product I don't want... S4 ellipsoidal: Dichroic Reflector; rotating barrel; interchangeable lens system; no tools required for changing lamp, focusing lamp, cleaning reflector, or changing lenses; capable of 575 or 750 watt lamps; locking gel frame holder. Help me ETC guys... that's enough to make sure I don't get 360Q's but I'm afraid of getting stuck with Shakespeares or SL's? I can't use "industry standard" as an excuse. It has to be functional differences. S4 Pars... Does this qualify as a unique product. Does anyone else make a PAR with interchangeable lenses? If so no problem I just specify that and I'm done. Selecon 6" Fresnel... I want a spec that requires a Selecon Rama (Stran would be nice but they cost a lot more... I think I've got the specs nailed here: zoom range of 7-50 degree or larger; the lamp focus system shall use bearings or some other system to prevent metal from rubbing against metal; must accept a 750 or 1000 watt lamp; Heat insulated rear handle for safe focusing, extruded aluminum construction for no noised due to heat expansion, sheet metal sides are unacceptable. More to come but let's start with these first.