Hello Keith and group,
One this to mention here is that the wooden block is offset on the shaft. This prevents you from inadvertently installing the bridge onto the block 180 degrees out. My layout requires that the TT bridge align with the track that runs from my coaling tower into the centre stall of the roundhouse and thus it has to align in both directions when the turntable is rotated 180 degrees.
If this is the problem with your block it's actually correct and you do not need to make a new one.
I also saw a comment about using the paper rivet strips. I have used these on my turntable but may not use them on the second yet to be built model. I built two of these Diamond Scale turntables when I lived in Dallas. Both are installed on friends layouts and I believe that they work well. Using ball bearings to replace the wheels sounds like a good idea. I have noticed a slight jerkiness on my turntable as it rotates and I attribute this to the friction of the tiny brass wheels as they roll on the ring rail.
I also used the Fastraxx rail bender to curve my ring rail and used ACC to attach it to the pit. So far I am most satisfied with the diamond Scale Turntable. My previous layout was On3 and I scratch built my turntable using that drive that I mentioned earlier.
Send us some pictures of your turntable when you get it done.
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