Andy, that reaffirms some assumptions I've been making over the last few days based on your apparent eCommerce inventory levels, and the overall consumer viability of the recoil kit. I've also been trying to spec out cable management solutions for those like me who would want to hide the guns inside the cab (via door or drawer). Problem is, most of these off the shelf cable retractors are in the £110+ price range, each!
I mean, adding that as an option rather than bundled in the base package seems more viable. Spending £60 on a gun, then £27 for the shells/solenoid, who knows how much for that custom cable, add a £80-100 retractor, times that by two, then add a power supply to run them both (let's say aprox. another £27). Add that all up and convert to USD/CAN funds and the number looks quite a bit larger.
I honestly wouldn't mind the ability to have an extra 4 conductors in the USB/Power cable so that one could run an RGB LED signal to the gun. I keep thinking how bad ass it would be if you could light up the side button with a ring of light like the IL pushbuttons Neph and I have in our builds. If not for LEDs then future expansion options. Maybe I just became overly excited when I read "specced a custom cable"

Wouldn't the ubiquitous ferrite core on each end of the USB section help with interference?