I should have added that I now own both the controller and the pad (I got an Initiator starter set, that was clearance priced, for 1/2 off at Hobby Lobby for a total of $47.50)
I own an AWESOME launcher, the Pratt SureFire2 system, and have no use for the Interlock controller. I was more curious as to it's eBay value.
The pad, however, I'm intrigued by. I normally use an Estes Porta Pad for 1/8" and and Estes Porta Pad "E" for 3/16 and 1/4". I'm not to happy with the functionality on 1/4" rod sized rockets, and was considering building the Mantis for use strictly on 1/4" rod sized rockets (so I'd bring all 3 pads to a given launch, if I brought an appropriate assortment of rockets.)
How would you compare the durability issue of the Mantis to the durability of the Estes porta pads? I've had fine luck with the Estes pads.