I'm a little pissed to find out today that there are people complaining about those Miracle Switches. Was about to order a double with the fuel dot built in.
Anyone here have first hand experience with them or the Valley View version of them?
I had the dual switch Miracle anodized red with a fuel port in my 71" slick with a DLE35RA that I abused for three years until I smashed the plane into the earth/water. (avatar photo plane). I rewired the charge port to accommodate charging my A123 batteries. No issues. I will say that after cutting the large hole for it I put a bead of silicone around the device prior to inserting it in the hole for a little extra vibration damper. I did this on a 20cc plane as well but used the double sided sticky foam on the back side of the face and trimmed it.
Now my planes are equipped without a switch. I use an XT60 connector instead. No different than flying a little eclectic plane.
https://www.valleyviewrc.com/dual-switch-w-fuel-dot-red
Not sure what to think of the booma pin style switch. Maybe its the fact there is a little 1/16" of free space when the pin is removed that is keeping your plane from shutting off... dunno. All the reports of this unit appear to be bullet proof. One failure I've heard of, but who knows how it was taken care of either? But a battery redundancy is nice.
http://www.boomarc.com/en/hidden-balance-switch-with-pin-flag
There Key Fob switches are pretty neat
http://www.boomarc.com/en/smart-switch-with-pin-flag-and-battery-guard-technology
I made a little thread a while back on a brico switch, that uses the same pin style concept, but was primitive and have never used it.
https://www.giantscalenews.com/threads/brico-43a-pin-flag-switch.7776/
Fromeco makes a nice "wolverine" switch that I haven't heard a bad thing about. Once again, Battery Redundancy.
https://fromeco-scale-avionics-llc.myshopify.com/products/wolverine-switch
Jeti makes a Magnetic Key switch. I've used the Single version. I didn't like the magnetic key arm plate connection. I have also forgotten the magnetic switch at the house before....
http://www.espritmodel.com/jeti-electronic-switch-dual-with-magnetic-key-dps-40.aspx
So all these sweet products and I feel that a XT60 coming off my Single A123 battery with a 10-14AWG wire into two 20AWG power leads for the RX is about as bullet proof as it gets. But that is for a single 35cc plane. I did the same with the Jeti plug but used an XT30 instead.
My thoughts are get what you want and do your best to make it last a long time if you are concerned... That miracle switch offers replacement toggle switches so you can maintain it and either replace the switch every 2-3 years or the whole unit.
There is always room for a failure point. If you are using Lipos, you probably want to charge them in a contained environment outside the plane anyways.