Really? The 4 IR sensor heads are typically more sensitive then the TBU, putting them at a disadvantage when up against Tamiya's, but I hear where you are coming from. The function of the TBU, or whatever you want to call it is critical to the fairness of the game. When you get a multiple of home built sensors, who knows how sensitive each one is. That is why I wanted something that was inexpensive and predictable. By utilizing the inexpensive HBU, and adding the LED circuit, anyone can build a Battle detector that is standard for under $20, and it's function is solid and predictable.

I strongly suggest every IR battler have one Tamiya TBU in their toolkit as well. This gives you a standard to use should someone have a problem with your homebuilt TBU. Tamiyas offer 45 degree defense, as well as slope defence(Physical limitations of the design) and if you seem to be gettnig taken out to often, switch to the Tamiya sensor and see how much your luck changes.

Personally I think the EL MOD system is the best out there. The different battling modes reduces the predictability of the game. I like their random kill option. i.e a lucky shot can take a tank out in one hit.

I saw TBU's advertised for $21. If that was the everyday price, I wouldn't have been on a quest to find an alternative.