I've built this kit twice and love it. I doubt that any PE parts will enhance the kit because the plasric detail is already terrific plus most of the parts will never be seen. I usually use a knife to remove surface detail for PE and then sand if necessary. If you've already completed and painted the interior then it's probably too late to be adding PE. The kit supplied dry transfers for the door sills and engine shroud are terrific but that's as far as I'd go. Please post a few pictures when you're done. It looks like you've done a great job so far.