Thanks, Jerry. I did the shim thing. Cut a bit with the shim, remove shim cut some more, repeat...
Finished the cuts with my 4.5" angle grinder with a thin (0.045) cut off wheel.
The cuts were at a 22.5 degree angle so they were a bit tricky. For straight cross cuts, I think will just use the angle grinder. The chop saw can be used to start the cuts.
Done for now, much to the neighbor's relief, I'm sure!