The focuser of the telescope is built from 3 parts. A 63mm to 1 1/2" female thread, a 1 1/2" male thread to 40mm and a 40mm to 3/4" female thread adapter.

The first adapter is turned down from 63mm to 59mm so that the 63mm tube can be pushed onto it.  Since the thread of the PVC pipes is tapered to achieve a clamping effect, the rear part of the thread is also removed. Otherwise the clamping effect prevents us from using the whole thread for focusing.

The 2nd adapter remains more or less unchanged.

With the 3rd adapter the side with the 3/4" thread is turned up to 1 1/4" to serve as eyepiece mount. Additionally a hole is drilled on the side and provided with M5 thread to realize an eyepiece clamping.

The 3rd adapter is then glued into the 2nd.

In general I have also turned the adapters once on the outside to remove the big hexagons.

Also here everything has to be blackened from the inside in the end.