[bkm2304 (Richard Brown)]

The other day I was collimating the Lightbridge and I started turning the knobs on the main to line things up. As I did so I realised that I had no idea whatsoever of whether the main was aligned with the tube assembly. I also realised that I had no idea how to make sure his was the case - and I'm sure it wasn't.

Does anyone know how to check this on a truss dob?

Does it matter all that much if it is out by a wee bit?

Thanks

Richard