Quite some time ago, the FLAP switch on my DX7 transmitter just broke off. Horizon Hobby was willing to fix it – if I sent it in – but I was unwilling to live without my Tx for several weeks.
I was also too scared to try and fix it myself. But finally, after months of steeling myself up for the process, I pulled the DX7 apart and replaced the broken switch with a $3 item from the local Radio Shack – a #275-0325 Single-pole / Double-throw toggle switch.
So far, it seems to be working perfectly – although do I miss the extra-long original switch.