Afternoon Dave,
Thanks indeed fort the great forum and the quick very informative reply.
If you add a "0" to the price of the motors you arrive at the quote we had from BMW - so that is going in the bin.
I'd seen a couple of videos a while back and thought it might be more than I'm happy to bite off and chew, but I will get some tools as you suggest and see how painful the trim removal is for my rather Clarksonesque skill set..
For my info, is the spindle drive the entire ram and I will be simply switching those over/is there anything more complex on the electricals/does anything need to be re-programmed when the new spindles are plugged in?
Thanks again for the reply - much appreciated.
All best
GAH