control valves and cyllinder bore for digger

[cdm]

I got a special delivery today

and i have 3 new questions:

1. voltage. 12v or 7-8v? what is stock for leimbach?

i was reading max rpm of the pump is 12k and even that is too high for prolonged use. im very disappointed at the stock motor that came attached. it has no bearings even. cheapest 2$ chinese 540 can they could couple Obviously i want to change that but need to figure rpm yield first.

2. the big set screws that sit against the valve actuators, from the top side. you remove those right? not supposed to use them to adjust or limit valve plunger movement? the valve block shipped with them screwed in somewhat but i've seen them taken out on wedicos altogether

3. idle position on the valve lobes/plungers. are they supposed to be opposite the valve pistons (the longer part; facing the wall) or should i center them onto the pistons and depress them? i could figure this part but i have limited parts and i dont want to blow something or dump all my fluid and then have to wait weeks for another order to come in.