I managed to make a little more progress. After having moved most of the Electronics including the 3S Battery into the Turret I was concerned about the amount of drag that would be created by the plastic surfaces sliding against each other. I want to add bearing between the Turret and the Upper Hull Turret Ring.
After looking around I found Bearing for the Taigen Tank(s) on the Taigen USA web site. Price is reasonable and shipping was free! Being in Georgia and they being located in Florida it only took a couple days to make the trip.
It took me a couple of days to figure how best to mount them and chain drill the location after laying them out every 45 degrees using a Protractor. Once drilled I connected the “dots” with the X-acto knife and files it was straight forward.
I had to cut all the way through the ring to set the outboard axle end at the desired height. This required the creation of a lower mounting surfaced that also needed to be spaced .020” deeper that the lower surface of the ring.
I filed the original raised bearing surface of the plastic ring down so the Turret would ride on the roller bearings. The Turret now rides mush smoother and will not wear down with use.
Thanks for looking in!
Barry
(...and everything else, of course, 
). Quite a few Tamiya tanks have bearings between the turret and upper hull, and I think they would be a great addition to all commercially available models!. They're not easy to improvise, however, but you have demonstrated a skilled and enviable solution to fitting them. One I shall attempt to copy in future. 
