I finished taping up the joints on the front standard and devised a pocket for the pinholes to slide into (also with gaffer's tape). I generally use gaffer's tape to "mount" the pinholes which I got from Earl over at f295.org. The holes come as 3mm disks with the hole in the center, so I tape around them. You can see better below than I can explain here.
So I started with the standard with a big-ish hole so that the edges of the foam core don't interfere with the light transmission to the outer edges of the image. I folded a piece of gaffer's tape in half and punched a hole in it using a regular paper hole punch. That got taped over the hole in the front of the standard. This pic is blurry, but I think you can make out what is going on there.
I made a flap where the pinholes slide into the pocket so that I don't get light leaks behind the pinhole.
The pinhole is mounted in a 'standard' (for me) square of gaffer's tape, so that all of my pinholes look the same except that the diameter is written on the tape. So these now slide behind the smaller hole piece.
So this is what it looks like with the pinhole inserted. The flap sticks out a bit, so it might even make a small rudimentary lens hood for mid-day shots!
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