Summary These are a must for anybody laying Flexible track makes the job so easy, and gives nice smooth curves. This is a different set up than the other one I have uploaded having a base plate that 3 stirrups are attached to. If your good with maths you can work out the radius of the curve from the chord of 200mm and the amount you off set the centre stirrup. Once locked in place the set-up is just slide along the track giving a nice smooth curve. I have a pair of these. I have included the DXF file if you have a laser to cut the plate out of perspex or something else or you can use the STL to print one out Post-Printing CLEANING STIRRUPS Th stirrups that fit over the track have an M4 thread in them so will need a tap put through them, and the slots mat need a needle file put through them.