I've done severall attempt to solve this issue.
My last one is to use a Bresser JM-33 2" Pipe Clamp Clamp (12 €), some plastic, a ISA plate (see pict), nuts&bolts.
Some pictures in attachement.
It is solid as a rock, easy to install, move and remove.
Nargis (45) France.
57 years old, Computer science engineer.
Some skills in sofware development (Windows / Unix)
Canon EOS 10D, 40D, 600D 1300D, EOS-R. + several lenses.
ToupTek IMX 294 cooled camera.
BRESSER Messier AR-102xs/460, Bresser Messier AR-152S/760
MAK INTES 713.
Meade LX200 GPS 10"
Old Losmandy G11.
SvBony 60mm x 240mm guide scope.