[nobby2 (Neil)]

I am using a bintel laser collimator in a crayford focuser 2" with 1.25" adapter as supplied in a new 8 inch bintel dob. The problem with colimation is on rotating the collimator inside the focuser you get a wide variation in the position of the dot on the primary e.g the collimator must not be true in focuser or the focuser may not be firm or aligned. I have attempted to tighten all screws and loose parts.

Is this a recognised fault in using this kind of tool Or something in the way i am using it?