So it seems that once I get rolling on a path, I tend to continue rolling down that same path for a while.
In that spirit, I remixed a couple more items.
I found that @Fabien’s side mount front bases and tensioner bases had the belt a little too close to the edge of the table for my liking, and the screw holes were tapered for flat head (countersunk) screws, while I am using pan head screws. I also found that the screw location on the front bases was interfering with sliding out the belt holder (it was okay if using flat head screws, but the pan heads were sitting proud and preventing the holder from sliding in or out).
Also, a couple of months ago I was reading a thread where one builder’s rails were a bit longer than the strut, so they were touching the XZ plates and causing the whole build to be a bit out of alignment.
Because I have seen this happen a few times, I pondered in that thread about making the end braces a few mm wider than the other braces, to provide some extra space to prevent the rails from extending past, and to provide a bit more rigidity and a bit more clamping force.
So I went ahead and remixed the standard brace to be a bit wider, for use on the ends. (same printing instructions as normal end braces - mirrored and thicker infill)
Just waiting for the last item to finish printing and then re-assembly can proceed.