Cheers for the comments Amigos, the Billy is coming on Great Guns..
GoldenEraMTB, I slotted in the MRC Ti BB and mounted the Steelies a coupla days ago; they fit perfecto.. It's quite amazing how wide the BB needs to be to accommodate the AMP Chainstay..
I ordered a new shock from Risse too, the Astro-5, which was a bit of an unexpected outlay [seems to be a recurring theme with this build!] but I'm sure will make this Rig much more of a Rider. The Mags will hopefully balance out the geometry too; the Judy DHs kick the front up a bit..
Also, I had some trouble with the Seat Tube area at the Seatpin clamp.. It seems that at some point [possibly last rider owner] a Smaller Than 29.4mm Seatpin may have been used because the Seat Clamp Split was bent i.e. a 29.4mm post wouldn't slide in so easily.. So, with a sacrificial Kalloy post, I've had to carefully prize the opening up and sit the Kalloy in there to restore the 29.4mm opening. I was worried that doing this Post Paint would mean cracking, but I seem to have gotten away with it..
Required to finish:
Black Ringle Holey QRs
31.8mm Seat clamp