Thanks for the interest/comments, but after spending yesterday deliberating (worked from home so took it for a few long drives), I'll be taking this off the market for the time being. Still may sell it in future, but I'll stick with it for now. I spent a good amount of time under the dash yesterday (not comfortable place to be when you have a bad back) fiddling around with the master cylinder & managed to adjust it to get rid of most of the freeplay. She's now shifting correctly.