Thanks for the help guys. I will try out the SG feature and see how it goes.
I have had nil issues with the Tak/Lodestar setup (used to be in a finder bracket! If anything was going to flex, THAT would!).
At least I can try things without having to unbolt anything
The focuser on these Greg is ROCK solid - it has 2 locking knobs, and NIL flex I can see. I didn't have to tension the grub screws providing pressure on the stabilising plate either (though have always had to with VC200L's)