I don't think it matters that much.
I originally made a set from hard wood 100mm / 105 mm F/R. Just simple blocks. Bit awkward to keep in place.
Later I turned some from Nylon 66 as per Ron Becketts drawing that fit inside the bump stops to stop them falling out. (I shortened them to 100/105 since the drawing is only for Testbook).
They just need to sit between the axle and the metal seat inside the bump stop.
Take a bump stop off to measure it. Mine was a bit loose using Ron Becketts drawing.
I originally made a set from hard wood 100mm / 105 mm F/R. Just simple blocks. Bit awkward to keep in place.
Later I turned some from Nylon 66 as per Ron Becketts drawing that fit inside the bump stops to stop them falling out. (I shortened them to 100/105 since the drawing is only for Testbook).
They just need to sit between the axle and the metal seat inside the bump stop.
Take a bump stop off to measure it. Mine was a bit loose using Ron Becketts drawing.
