Last weekend I finally realized my dream of a "starter set 4-4-2" doubleheader.
I found a cheap replacement shell for my NYC Flyer locomotive, cut the pilot off with my Dremel, transplanted the guts into the modified shell, and attached the front coupler to the locomotive's frame with a 1" long piece of flat hobby brass this time.
I run my Nickel Plate Special and the modified NYC Flyer together in the doubleheader. It works better than I could have hoped. Both locomotives have can motors and electronic E-units so they match speeds well, and switch directions reliably.
It doesn't look half bad either. If you're familiar with the 4-4-2 starter set locomotives, you'll know the pilot is small to begin with, so I didn't cut much off.
To make it look even better, I would like to cut the pilot in half vertically, and "glue" it on the front corners of the shell on either side of the coupler, with room to swing of course.
What kinds of joining techniques do you use in your kitbashing and/or repair of diecast?