molerj,
I installed mine myself and it went pretty smooth. As you can see from the parts blow-up, the kit doesn't look too intimidating. The instructions are easy to follow. Installation is straight forward.
The most difficult part for me was that some of the spaces available for my wrench to tighten fittings were a little snug because of other hydraulic plumbing in close proximity, and part #15 (plug) seats deeply in the SCV/rockshaft valve body, tightened, I believe, with a long Allen wrench. I don't remember the plug being hard to place, except I didn't have an Allen wrench long enough, so I had to rig something up. Not an overwhelming challenge. The kit fits perfectly and has worked well from the start.
So, far mine has only been used for backhoe work. In the future, I would like to install a valve for Top n Tilt and maybe have a couple extra valve functions available for hydraulic backblade manuevering. Just kinda dreaming.
OkieG