Been following this thread with interest. I appreciate the frank discussion and always seem to learn something.
It is clear that the gap beneath the rear standard of most field cameras, and around the rail on monorail cameras is a common source of irritation in an otherwise, nice, dark environment. This is true even for me (I use a Toyo metal field camera) and in between my own photographic efforts, I've been noodling over various strategies to solve the issue. In the mean time, I devised a work-around that isn't too painful.
It is natural to place the neck of the BLACKJACKET(TM) around the entire rear standard, but this includes the above mentioned gaps. If one is not working in a really windy situation where keeping the device attached to the camera is of utmost importance, the gap can be eliminated by placing the neck on the camera obliquely (an illustration of this method is used on the website for the 8x10). The top edge just barely hangs over the leading edge of the top of the rear standard and the bottom of the neck is stretched across just beneath the film holder, which excludes the gap. In this configuration, the adjustable elastic still does a good job of grasping the camera.
But, one must exercise care in this situation not to have fabric from the neck sneak in between the film holder if the device is left in place when inserting film holders and making an exposure, otherwise it works well.
That doesn't mean I have given up on finding a solution that can be built into the device, it is just that I've not settled on one that I am satisfied with. The products have evolved quite a bit in a short time based on feedback and while the evolutionary slope is not as steep as it once was, I don't expect that process to stop anytime soon.
So, thanks to all the fans, and to those folks who still don't think it solves all the problems, necessity is the mother of invention.
And yes, the other sizes are almost here, I just need a few more hours in the day and a couple clones.
And I just looked at the clock. It is a least 1 a.m. in Greenville when Sandy posted his note, so somehow I don't feel as tired as I did a moment ago.