Glen,
Nice artwork, the proportions look about right and the details look great! You might want to see about stretching your abilities by trying to do some perspective drawings/orthographic projections.
Tom B,
Nice score on the 169, it will be a powerful and ground-shaking addition to your stable. The solid mounted 1-lunger will definitely shake, rattle, and roll.
Anyway, I do have a question about hydro noises on my 129, which I have noticed since I got it. It seems to make a growling noise sometimes when it's idling in neutral, but the noise goes away when you speed the engine up and working it. The unit seems to otherwise function OK, and yes I have worked on the trunion, changed the Hy-Tran and filter, and got the neutral adjust reasonably well adjusted over the winter.
If it is potentially serious, I do have a complete rear end assembly out of a 127 that I could potentially transplant all or in parts, but I am really only condidering the 127 Hydro rear as a potential standby resource, and have not tested it. How much of it is transferrable? I imagine things like the check valves, etc are, but I'm not sure about the rest.