Understand, but why increase risk when it's not warranted? You folks want to play with some cheap electronic gimmickry designed and promoted by people interested only in corporate or individual profitability. OTH, I work with stuff using redundant electrical safety circuitry, the best components your money can buy, and still manage to wipe out a control system every time a spark plug cap fails to maintain ground or experience a ceramic failure on the plug body.

Hobbyiests use some of the cheapest cap designs availble while I use aircraft grade designs. Hobby ignition plug wires are about as low brow as can be, are prone to failure, yet people seem to believe they have and are using the latest in ignition technology. So the next thing they do is remove the only electrical real isolation they have from the rest of their system by running ignition off of a single or paired flight battery. You save what, 2.5 ounces overall?

It's your plane and your money, but as Pe noted, it's not just your risk. Bear that in mind if and when something happens. Your only arguement is that these devices shave a couple ounces of weight. That's a very poor reason to place everything and everyone at risk.