Well, it will save roughly 4 ozs if you were to use a separate battery and switch harness for powering the ignition module.

The neat thing is that you can program practically any aux channel to act as switch for the igintion on newer radios. It is soooo convenient to switch the ignition on or off with the TX. I am sure it is safer too. It has an LED that turns on when the unit is active. The LED is mounted such that it can be seen from outside (DUH!!). It is bright enough to see in sunny conditions

I had a hand in testing some rather old equipment (10 to 15 year old Futaba, JR, Hitec on 72 MHz) and this thing worked great, meaning no loss of range when the ignition was firing 10k rpm. Newer equipment are a nonissue of course. Ed did a great job in the design, with very good filtering and very low power consumption.

The IBE makes the SAP 180 all up weight something like 35-36 ozs. Very close in weight to an OS 160 set-up for example.

Glow engine pipes work fine with gasoline powered engines. Remember that the reflector must be about 3 " longer for gas than for glow fuel which means the set-up gets long and won't fit many planes. The ES 30 and 40G pipes have the reflector back to where needed so the external appearance and dimensions of a set-up are very similar to glow 2 strokes

BTW- Mintor makes a very nice aluminum pipe for their 37 cc engine that will work probably the same as the ES 30 and 40G pipes. I don't think they sell it alone...you have to buy the return to center header as well, I believe. The set-up is around the same cost of the ES pipe. The weight is reasonable at 4.6 ozs (vs 3.6 for the ES). Personally, I did not appreciate doing business with the people repping Mintor, however the product appears to be good.

Matt