Thanks Tim, Gary, YOAV and Don...much appreciated from you guys.
Here is part of the building sequence for the basic engine. I will be adding some more details to it soon, but here is the state of affairs...
I discovered that you can get cleaner paper folds and make the cylinders easier if you add a tad of water (hence the brush to apply it sparingly) to the paper and then form it. You guys have likely known this for years, but I was pleased to finally figure it out with a bit more research on YouTube. I'll keep experimenting, though!
I'm going to add the manifolds out of paper soon...they look a little tough to do since their diameter is pretty small for me, anyway.
We'll see how it goes tomorrow.
Thanks for looking!
Dan