Thanks RR, saved me saying all that !
I have found that the Orion/Andrews style lasers have a good outer casing.
However the internal module is a cheap $5 laser module you pick up at most discount stores
Over tightening the screw that activates the module switch, can bend the PC board inside the module making the alignment way out !
Its fiddley but can be fixed by fitting a spacer to ensure the screw can not be overtightened.