UPDATE: Added an additional 3mm height to the jig for people having trouble lining up the holes. These are 3 jigs that i made to help build your own rear rails in countries that cannot have them imported. These have been simplified by only using the side walls (like Riptide Split Rails). They were originally designed for PY2A but they also fit in my FMDA frames too. Once they are cut into shape just sand down the edges for a snug fit and polish.