I really like seeing how others got theres all setup too. Been using that blue HF filter for a while now and its been working well. Only problem was it leaked at the regulator going into the filter part, just had to reseal it with teflon tape. Can't really be upset for $20.
I used copper too. 3/4" When it wasn't $o much. I liked the setups at www.tptools.com
and followed the Sharpe diagrams. I think it was actually designed/started by Kosmoski? Mines up 6", back down, then up 8" again to the regs.
Heres the HF filter after about 40 ft for the air to cool.
Sharpe F88 $44 with an HF filter reg. Same 25 ft retractable like Rambo's shown above
This ones after around 65 ft of copper.
I got bored and used some 1/2" pipe after first 25 ft, and used a Craftsman regulater that was given to me. No filter, just an engine bay/misc drop.