I guess Lee didnt post the bits to me as promised, so in the end i scooted off to a local nut n bolt supplier only 1/2 mile away and not only did he have the corrrect allen key grub screws for saddle height and the intonations screws, he supplied the grub screws in stainless and the other screws in zinc plated, which is a bonus over the mild steel originals which were rusting.
The only parts he couldnt find were the intonations springs, but i found a bass bridge in one of my chest of draws and robbed the springs from that, so its job done
The SB 900 bridge is now buffed and refitted.