I have a history of altering things to make a good mod. What type of fab work did you mean? Would depend on which item above if you molded the smaller piece and sanded and painted or if the full piece needs a little work to fit nicer. TIA
The second, smaller one. You can heat it up with a blow dryer or put it in the oven to help soften it up to mould better to the Gen 4 pillar. The top portion fits great, but there is a small gap at the bottom.