Hey all, I would like to upgrade the focuser on my 200p Dob. I believe the one it has currently is a Dual fit crayford? I would like something better made and with dual speeds. I think I am right in thinking all of these would do: First Light Optics - Dual-speed Crayford 1.25/2 inch focuser for Skywatcher Explorer First Light Optics - Skywatcher Dual-Speed Low Profile 1.25/2 inch Crayford Focuser Revelation Newtonian Crayford Focuser Dual Speed Is it just a straight swap, and do you have any other advise? Thanks,