Accidentally sliced off the rear pilot, options?

[Rscott417]

I was trying to slice off some molded pilot details then sand it to make room for a plow and other pilot detail and I accidentally cut a chunk of the pilot off. I made the diagonal cut a square and was going to use some styrene and putty to fix the pilot. Is that the best way to fix it or maybe someone has had a similar mishap and has a better method.