Project SP-TS Shadow with Range Report Didn't I mention somewhere abount being busy? TARGET: The below picture is not of my weapon (yet). This is something that has been on my mind for quite a while. Finally, gathered the courage to go for it. I did arrange an analog Mitutoyo vernier, to get the measurements right. DRAWING BOARD well, almost a drawing board! not to mention almost a drawing! -I measured and compared the side to side frame clear space at the muzzle (where it is slightly less to act as a dust protection), and the major part of the frame behind the immediate muzzle area. -I also compared the vertical clearance, as well as wall thickness of frame on all sides. -I measure the width of slide rails, to find out how much material would have to be removed from this area, to ensure that the slide and frame fit. I am not looking for a competition fit here. I would not mind some very slight play in the slide-frame fitting, as this would be a tactical weapon. And again, most of the accuracy is from the barrel to slide fitting, and slide to frame. However, if I undertake another project, it would be a tight finish one, with minimal tolerance in mind! FRAME MODIFICATION From the drawings and measurements above, Opening in SP01 Shadow Frame at Muzzle: 15.8mm Opening in SP01 Shadow Frame after 0.5" Muzzle: 17.4mm Required minimum opening: 18.6mm Below is the what the frame looks like from the inside, after all the filing work. Don't blame the picture here. The finish on the inside of the frame is 'that' bad, as I did this work myself. It took me around 7-8 hours spread over two days, and two files to get through. I did not have a bench vise. Decided to hold/grip the weapon in one had, and file with the other. Kept changing hands, giving both of them a good working. A bit crude, but the clearance was made alright! UPDATED ON 26TH OCTOBER I have further polished the internal face of the frame on both sides, to smooth out the rough areas. Below pictures might give some idea, plus, also look at how much the dust cover is opened up.