Roger that, Wings. That's what I was sayin'. Hydaulics. The location of the needle valve makes no differenc, but as I stated, don't make your line from the tank to the engine TOO long....though I have had them with tanks over the C of G, which was 3 times longer than normal, with no problems. Look around at your LHS, you'll find remotes for under 10 bucks, and you CAN use an O.S. or other needle valve assembly, just use your imaginator to mount it- 5.95.
BTW, the standard inlet to outlet ratio is 150% of your inlet area for good cooling, you can, and may need to go bigger if needed, but 150% is the general standard for full sized aviation.

Jetts