The solution that I use for this issue, typically, is to strip a small piec e of fine gauge (appropriate to the MPC) copper wire -leave it on the spool for leverage - preferably hardened, and I keep a couple of small spools _o nly_ for this purpose, and push it down the connector beside the broken wir e. Touch this wire with a hot iron and a bit of solder to bridge the break, and then cut it off with fine nippers. If the MPC is very fine, I will pre
-tin the wire as it may not flow down the hole. If and then, a bit of hot-m elt or similar to insulate any exposed wire. Done.
I have been known to use a silver-plated sewing needle, broken off to the p roper length if copper would be too soft. They solder very nicely.
Peter Wieck Melrose Park, PA