This started with a comment made by Newspaperman5: "Sweet! I would love a smaller and/or more capable version of [TMD-1] as a desk toy!", and it made me realize that I did too!  I loved messing around with TMD-1. The tile interface is fun to use. There is enough there for educational purposes but I found that I am wanting more.

In this next iteration I will try to bring forward the simple to use, easy to understand, principles from TMD-1, but the emphasis will definitely be on increasing the overall functionality. 

I'm thinking a 6-state / 6-symbol machine would be a good target. With it for instance, you could explore the 5-state / 2-symbol "busy beaver" problem for which there is still no definitive solution. Pretty cool. 

So that's the why, and a little bit of the what, so now I just have to figure out the how.