Hi Waz. Just saw this post. Although I am not the droid you are looking for.

It looks like the total scale length (around the 651mm mark is quite long?

My TLA-1R had a total scale length of 626mm after putting in the wilkinson bridge and putting in the longer intonation screws (PGB standard) and winding them all the way forward. I have a lot of latitude to tune the intonation with the longer screws. when i did the mock build, I thought it would be harder to intonate with the vintage 3 saddles but I had no problems.

Not sure if it helps but when I put the bone nut on my LP-1SS and I didn't get the right height I could tune the guitar but when I played open chords it was out of tune and the intonation was not right. I've got a Dingobass F style bone nut in my TLA-1R and had no problems when i set the height right.

Not sure if all that babble helps you much.