T70MkIII said:John, are you using the fignoggle plans? Their mounting blocks look similar to your photos.
Either way, Fignoggle suggest only making a scale mount at one end of each table, and the bracket attached to the head takes the rest of the weight. They suggest this because if you use a mount at each end of the scale, and there is any misalignment, it may cause binding or undue wear. Regardless, it would resolve your problem of too long a scale.
My mounting blocks are using the TLAR method...I guess I did take a peek at Fignoggle's design....
Mounting one end a leaving the other free wouldnt have been my first choice, but having thought about it, you are probably right..