I have informed the machinist about the run of UBHs in August (should be about 2nd or 3rd week in August to do the machining), so you can expect the pre-orders to open up late July/early August.
I have drawn up and submitted for quote two designs of tailcap modules to fit the battery extension tubes. I'll find out what the quote will be this coming week. They will simply screw into the female end of the tube, and will allow one to use either the Kroll TCS or the E-series tailcaps, depending on which model you have. Being totally different TCSs, they each need a different design. The male end will fit either an E-series head, a KL1 head, or a McLux head (same threading). If you want to take the idea even further, you could attach an E2C and use a standard-sized SF head as well. In fact, if there was interest, I could even do a 3rd design for a standard-sized SF TCS...
How's that for modular... /ubbthreads/images/graemlins/smile.gif