I'm interested in the ball valves. Do they have feedback on percent opened (e.g. rotary encoder, full open close feedback)? Do you have a link to spec sheet/documentation?
I have had major difficultly finding a working adapter/power supply. One from Frys rated at 3000ma and 9-20v cannot handle the peak amperage draw and cycles on then off repeatedly.
I found a few on eBay/amazon but they all ship from china and take 17-27 days for delivery. Printer or...