I am seeking some guidance on the best quality switches to use on our planes. (Or some other input on what might be going on here)
We recently lost 2 planes due to apparent radio failure but have not been able to find anything wrong with any of the flight equipment. At the time we thought that the planes went in due to radio interference which had happened to a fellow club member a week or so before.

I was running up a new plane last week with a "still being run-in" Saito 1.00 in it. When I brought the throttle up to half way there was suddenly no response from any of the servos - Luckily this was on the ground and I had the cowling off so I could pinch off the fuel line to cut the motor. I checked everything over for loose connections etc, tried everything with the motor off - including tapping the Rx and found no issues. restarted the motor and it happened again. Because it is still running in, the Saito 1.00 is running rich so it is vibrating a lot. I bypassed the switch to see what would happen and the problem went away - It makes me suspicious of the switches on the other 2 planes that were lost - one was powered by a sweet running Saito 82, the other by a well run in 46ax. I have not been able to prove the switches were at fault on the 2 crashed planes as I automatically tossed them after the crashes but those switches were purchased at the same time as the one in the new plane.

Whenever we put a plane in I toss out the switches and battery packs and all flight battery packs are replaced every 12 - 18 months (between me and the two teenagers - we fly a lot and therefore we "replace" a lot). I also send the Rx's in for checkout before they go into another plane. Except for the Digital servos on the larger planes, I check the servos out myself.

The switches that I have been running until now are MPI units with the built in Charge Jacks (not the ones with the LED indicators) - I am running Hitec Q-PCM Rx's with 6v Sanyo Flight packs, Hitec servos (HS 475 HB's, 645 MG's and 985 Mg's - depending on the plane). I avoid Y harnesses wherever possible and whenever I use lead extensions - I put heat shrink over the connections to stop them coming apart.

Any thoughts?