John C on here has been developing a new board and eye system for angels without eyes (pre-Fly models). He is an Angel tech based in Sale (Manchester)
From what he has told me it is £120, this includes a whole new custom board running off a 9v, eyes, and all fitting and milling required ( they have their own man on the milling and drilling job). also i beleive you get the gun checked over and set up/serviced when you send it in for the mod.
PM John C for the full tech spec. However i plan on having my gun modified. From the latest i heard on it, the new board will be fully PSP/millenium compatible with 15bps ramping among its features
Hope this helps for now
Ian