Ok, so went out to River Music (Windsor) this morning for a few bits and pieces. Awesome shop, great staff and some cool instruments of different sorts.
While I was there I got to play 2 different instruments. 1973 Gibson EBO (Set neck) and Tokai Vee bass (BO neck). Both had 3 point bridges. Both had high action and to be honest, given the bridges and the like, I think it would be hard to get them really low. The other thing that struck me (and the guy there agreed) was that the rear pickup in the EBO did not cover the E and G strings. I didn't have the range and spacing near the bridge was too wide for the PU. Apparently this is typical for 70's gibson, lots of little dramas. The bass was a boat anchor too. REALLY heavy.
So I learned two things.
1. I don't think I want a 3 point bridge for a variety of setup reasons.
2. I need to be very careful with spacing.
I reckon I need a narrow bridge for the T-bird pickups. I'll be testing their field before I buy anything coz WeeMac had these very dramas with his 8 strings. So, It seems to me like Tune-O-Matics and 3 points will be out. I'll be finding something more narrow like say, individual bridge pieces. Stay tuned and thanks for all you ideas so far.
P.s. the body tracing also turned up today. Thanks JIO!