The only problem I can see with that TPG is the huge body of it....
I have a small Dumore with a 2" wheel, and I suspect it may stick the wheel out farther and have less obstructing it than that one with its 3" + wheel. The big box section, which is mostly empty space, could have been a LOT smaller, if they had not opted to bolt a big flanged bearing carrier into it from inside.
Even with the Dumore, I get into trouble with the pulley drive end (equivalent to where the drill chuck is on the pictured unit.)
Is it less bulky "in person" than it seems in the pictures?