Recently installed the full set of miniplayfield Cliffy's.
After getting everything put in place, which was fairly easy to do, I put the miniplayfield back in and there was some binding. I turned it off and read about filing down the screw holes to adjust the playfield back. Bought a cheap set of hobby files, and a half hour later reinstalled. No issues whatsoever. Everything is sitting flush and it looks and plays great.
I bought the whole Dr Who Cliffy set and happy with the product!