Hi All,
After reading my original post, some emailed me and asked me for an update along with some pictures. This was a fun project. It took longer than I had expected, but very worthwhile.
Two things I would have done differently:
- Gone with quick setting JB Weld
- Purchase the pictured Dremel tool from the start - I won't do another one without it.
The toughest thing for me was to get the right timing down...I had 3 even chuffs, but "chuff 4" had a slight lag. I'm a drummer so things are either in time or out of time...nothing in between. 
I don't know if it's perfect, but it's pretty close - good enough for me. I worked on the "timing" quite a bit. Because I had one lobe off, I had to figure out which one it was and then build the lobe up with the JB Weld and then sand it down. Rinse and repeat...several times for me. It got to the point where I could put the cherry switch back on and spin the drivers in both directions and listen for the engaging and releasing of the switch. After it sounded right, I put it on the track and confirmed it. **The other thing I did was bend the very end of the cherry switch tab to allow it to slide over my crude, but functional lobes. I did this prior to using the dremel tool so I may have been able to make the valleys smoother with it.? - before using the Dremel, I was trying to get small pieces of sand paper in there with needle nose pliers as well as a dental tool to scrape.
Attached are a few pictures of the lobes I made plus the dremel tool that saved hours of sanding by hand.
If you're contemplating this with yours, I suggest you to go for it! It really is a fun, easy project. I have two more TMCC steam engines to tackle. I'm anxious to see how much faster it goes now that I have one under my belt.
I hope this helps anyone who is considering this conversion. Good luck!
