Woodlandsprite, if you get the CSC bash plate I'd recommend two mods before you mount it. The plate has a really tight fit on the upper right and along the right side. I'd cut some of that off:
You could even be more aggressive than my marks.
The second suggestion is on the left side I'd cut a hole to give access to the plug you need to remove in order to find TDC so you can set the valve lash. I discovered this after this photo was taken and I have yet to make this mod because my mill is dedicated to another project.
As for taking the plate off to change oil...I did not. The strainers will drop oil onto the plate and you will have a bit of mess but IMHO that's not a big deal. I installed a quick drain valve so dropping the oil is fairly painless and clean.
If you go this route make sure you get the 16mm version.