Also removed the counterbore of another Leimbach valve set. These are the mini sized. Way smaller, but not enough to fit a 4th spool. The factory counterbore at the pump and tank connection don't work with my SMC 90 deg fittings, so I machined a little pocket.
Will use the stock pump tank for first run, but will try to build my own out of welded stainless. If that leaks I'll have the tank printed as MJF nylon.
Boom is coming along tacked together, but need to turn some spacers to (re)build the tilt mechanism.