I have been told by Peterairguns on here that the 2nd L shaped bracket is 1/4 of an inch longer than the one the rearsight is on; that is is profiled for a scope and (on his example) has no hole drilled in to secure it to the cylinder.
I have one pistol with a tapped hole on top of the cylinder and one without. I don't know which is the earlier gun.
The wood grips that were made for me, are secure with one screw either side and one screw going into the underside of the frame, like Milbro showed in the hand book.
The built up trigger was a mixed thing. The standard length trigger piece (rather than the longer one I made up) fouled on the cocking arm when adjusted up, but a bit of filing might sort it.
Where the bid sear was welded, unfortunately (1) I told the welder to weld it in the wrong place ) (2) the thing must have been on the limit of wear and decided to stop cocking. So it is going back to be built up about 3mm forwards to be on the safe side and then the bit that holds the piston will be made wider.
If anyone has some spares for one of these then give me a shout please.