Stern lifting prop for 20 MA with bracket

[Capt Chuck]

If you lay it out accurately and are handy with a sabre saw, drill, files.....but it still needs to be off. Alum. is really easy to cut, drill, etc.

I think with proper lay out, tools mentioned above, masking (transom protection) and prep you could cut the opening without bracket removal. Using your lenco's also is not out of the question.
I'm going to steal one of "Stricks" photos. If I'm not mistaken his bracket was cut for his Lenco's after mounting

[Bushwacker]

Here is my trim tab mount with the Bennett tabs. They need to be mounted out at the chine to get maximum "roll control".