DEC quad board rack

Well, I thought people might find it useful. Over time,I've made a variety of shelf designs to hold my boards, searching for something that worked really well, and I liked this one so much I thought it was worth passing it on. In fact, I liked it so much that I took the dual rack (next to it in the picture) which held boards horizontally, and re-built it into one that holds them vertically, like the quad rack. For the duals, the shelf-shelf spacing (i.e. bottom of one, to the top of the next) is 5" (i.e. the repeat distance is 5-3/4", when using 3/4" planks). Nope. I made another quad rack for my workshop upstairs, and built an exact duplicate of the first one (in the picture). And I made another vertical-type dual rack, also for upstairs. About the only thing I'd have changed (had I thought of it in time) was to make that second dual rack a mixture of dual and quad shelves (which you can trivially do in this design, unlike the horizontal-format one) as I need more quad shelves, and have an excess of dual shelves. Oh well! Well... There are some DEC boards which have a Berg connector on the top edge, and ones which use the later Berg (the ones with the little latch handles) sometimes place them too close to the edge. One example of this is the M7800 (DL11); they _just_ fit in a shelf with the 'proper' 10-1/4" spacing, but I have a couple shelves where, due to variation, the shelf-shelf distance is only 10-1/8", and M7800's won't go into them. The M7856 (DL11-W) is the same. For the dual shelves, the E-Rev of the M5904 (MASSBUS transceiver) places the top of the latches about 1mm from the edge of the board. (The F Rev has been re-laid out, to move the connector a but further in.) I guess it would be possible with very careful cutting to space shelves to hold that, but I elected not to; the tolerances are so slight, a bit too far, and boards will come out of slots. And some off-brand QBUS memory puts a resistor a little over 1mm from the card edge, and those also won't go. Noel