The 360 apple is the easiest in the world. 4 sensors straight up (actually if you put it in a 1" white PVC, just one will read from 360).

The effort is so apples don't read from all angles, just cardinal points.

Remember IR battling is a game, like laser tag. If it was meant to be realistic, you wouldn't be able turn your turret or put your tank on an incline to become impervious to damage. If you want realistic, get everyone to buy an El Mod and spend the time setting it up to customize damage so a hit on the right side effects the right track, etc.

Unfortunately, as Brett pointed out, the only way it would work was if you had a group of guys willing to spend a good amount of time and money on their tank, each buying the same system, modifying the same way, etc. It ain't gonna happen, too many variables. Easiest way is to make it as simple as possible and use existing commercially available units.

As it is, anyone could show up with a Tamiya compatible StuG that would wildly outperform an OOB Tamiya.

At this point I only battle with friends and my sons in my backyard with tanks that are set up to be very hard to aim and hit. In a club setting, I wouldn't be competitive, but there hasn't been a club battle within 8 hours of me in a few years anyway, so it's all good. Next step in our battles will be total FPV, we're testing out systems now.

If you really want a 360 apple, it'll cost you less than $10 and you'll receive hits like it's the end of the world.