Hi Jimmy2405,
I did a lot of research prior to building my 2 X 72 Grinder. I tried to take the best of each design and incorporate them into my grinder. The TW-90 is a really nice machine and I liked his tool rest system a lot so I used a similar system on my machine. Wilmont also make a fine 2 X 72 Grinder. I made a lot of different brackets to make the tables as adaptable as possible. I use my machine almost every day and I love it. The variable speed and my rotary platen design makes it the cats meow.
A BIG THANK YOU to everyone that has posted pictures and video of their machines.
John