hehehe its good to see that sky watcher is still screwing people over!

it is a 2 inch focuser, but once you get into the tube its ever so slightly smaller to stop tihngs from flying into the tube.
Quick fix, get somebody to put the colloar to the draw tube into the lathe and mill out a very very small slice from the inside, this allows your 2" to slide right down.
More expensive fix, and more than likely one that you will do anyhow is buy a decent focuser Moonlight, Feather touch or the like
Good luck
Brendan