Sky Surfer III – Flat base adapter made of ABS

Unfortunately, this will not work. The minimum distance between the holes is 25mm, the largest (from outer end to outer end) is 42mm. The Sky-Surfer III – tube adapter set made of ABS # 2957303 has got a bottom which is a little bit more curved, but otherwise, it would fit. the distance from inner edge to inner edge is 8mm, from outer edge to outer edge its 33mm.