RRS has pictures of their plate available
(previously, they had a drawing
RRS - Plates for Pentax K-1
The plate looks very nice and weighs less than my plate for the K-5
Great
The bottom part of the L, the plate for the base of the camera, does have a screw hole. However, the side of the L is not tapped for a screw. This is a question I had failed to ask...
What follows below is not general information and will be of less interest to most people... it is about my use for the bracket. The bracket is less useful to me and my special case (cobbling together gear for single row panos) but it still looks like a good product. If I used clamps like a normal person rather than trying to save weight with screws.. the bracket would have no negative points :^)
The bracket for the K-5 had both sides of the L tapped. With small lenses like the 77 or 21, I was able to use a 2.25 inch rail (really a mounting plate for a tripod head) screwed to the L and take portrait oriented single row panos with very little parallax error. A tidy kit.
Using a larger 31mm lens, I knew I would need a little more length on the rail. For the K-5, the 73mm rail would work so ? I ordered that. Well, the K-5 plate is tapped at the front but the K-1 plate is not. So, I would need longer than 73mm and the K-1 plate is not tapped to screw the rail on in portrait orientation anyway... anyone need a 73mm rail? :^)
I will have to get a rail with a clamp...
They have one, of course, that is almost the exact length I want and adds less than 2 ounces.