All, Well, I have this idea for a patent ... but ... it requires a power supply ... and I can't find one that meets my needs. I need to come up with the smallest, cheapest 110VAC -> 20VDC, 10AMP (or close to that) power converter (about 190 - 200 Watts), constant voltage. Small means about 5" X 3" X 2". Ideally, I would find some commercially available power supply for less than $100 a copy and adapt it ... but, no such luck. I can't find one that size at any price. There seems to be a barrier at about 120 Watts. This is due (I think) to the U/L certification requirement for 30 cfm air flow (fans) to get any more power than about 120 watts. So, things above 120Watts get a lot bigger (about twice as big in terms of form factor). But, maybe ... hopefully ... I'm wrong about that. I have two design ideas and the primary factor that differentiates the two is cost. A small $100 or less unit makes my desired plan the best option. If price is above $100 then I must go to the second option (which allows a bigger power supply but requires lots more cables and other manufucturing ... it's not as good a design ... but it will work). I dunno. So ... anybody think of anything??