I installed the Easycars flaps today.
The rears mounted on directly, no problem.
For the front ones, I think I understand the trimming that @AKK-LC250 was talking about, but I was able to install them without doing any trimming.
View attachment 16234
This is what the front flap looks like, post-install, without any trimming.
The offending piece that I believe you would need to trim the flap around is this, I think:
View attachment 16235
It only sticks out about a half inch though, and the mounting screws / clip for the front flap are all on the other piece, so if you can mentally deal with the fact that there's a bit of pressure pushing the flap away and it's not sitting perfectly flat, then you don't need to trim at all.