I use a 5 pin socket as shown in the picture. The Tamiya sensor uses the same pinout configuration. A TBU plugs directly into this with no issues, and as I mentioned earlier settles all club disputes. If someone doesn't like your kit bashed sensor, then just plug in a Tamiya sensor and stop all arguments.

On the flip side, these HBU hybrids don't cost much to make, 4 for the price of one Tamiya apple. So if you build these like I do, with a 5 inline pin arrangement, they are totally compatible with the Tamiya systems in use. The USB and the 9 pin arrangement work fine but it prevents easy swapability with the Tamiya product. I went with easy swapability and in my opinion that is important in the systems you build. If someone complains about one of my sensors I can take it off my tank and let them use it while I use a Tamiya, End of debate