I used Protech on the strength of my previous mint 450D IR which I bought s/h, I sent a mint 40d to them to be converted and it came back with scratches to the rear LCD screen, I imagine this was the result of removing the eyepiece and laying it down flat on a dirty worksurface, they offered to replace the screen but I no longer had any confidence in them making a tidy job of it so I told them I would do it myself and they sent me the new screen.
They also told me the £250 cost included the return postage but I later found out they had added the return postage to that sum!!
I will try elsewhere for my next IR conversion!