If you want to use the Telrad on more than one telescope or on more than one position on one telescope then you can get extra bases for the Telrad. The bases are identical to the one which is included with the Telrad and can be mounted the same way.
The base can be mounted on a broad range of tube diameters or even on flat surfaces. It can be attached with double-sided tape (recommended) or with countersunk screws (not included).