I'm attempting to build a serial cable to connect a Bluetooth 4.0 module to a RTFQ MultWii Pro Mini through the serial_0 JST-SH socket. I have a suitable crimper and can get pretty good crimps, but trying to get the contacts pushed into the housing is causing me no small amount of grief. The "walls" separating the contacts are very thin and easily ruptured, which means I'm getting some shorting of contacts inside the housing. So far, I've made three unsuccessful attempts.
Does anybody have any tricks for shoving the contacts into the housings?