We replaced all the side windows in our 67F. The side windows required very little trimming. We used the Mooney recommended glue. You can find it slightly out of date on e-bay very cheap. It is not hard work, but it is time consumming. Each hole has to be drilled and then countersunk. Use a drill bit and countersink made for plexiglass and you will not have to worry about cracks. As you work around drilling the holes, you need to put screws in about every 3rd hole to hold everything. You also need to dress the edge to help provent cracks. It will take a couple of hours to get the old glue off. We purchased new stainless hardware to reinstall them with. The glue is a little messy, so put one strip of masking tape around the window and one around the aluminum skin. Punch holes through the tape for the screws. When you tighten up the screws the extra glue will squeeze out around the edge of the window.Apply the glue and let it sit for about 24 hrs. At this point it is no longer sticky, but isn't hard either and will just pill right off. If you try to clean it up when it is still sticky it is very difficult. It is a 2 person job, one inside the plane and one outside. If you don't want the plane to be down very long you might try doing the front 2 and then the back 2 later.
We used the .250 solar Grey and really like it. I have some pictures in my gallery.