Very interesting idea to have a stereo out with different voicing, with both channels feeding one output if nothing else was plugged in to the other (like the Boss Digital Delay pedals). Would also be interesting to see what the differences are between the PT2399 and the MN3005, although it could turn out that the sweet spot for rhythmic repeats is less than the half-second or so you can get from the 2399.
I looked at the build doc and I am consistently impressed at the way VFE stacks the parts while getting consistent placements for the pots and switches. Using the inline strip sockets on each side of the memory chips to free up a bit more space under the board was a good choice -- otherwise I guess those parts could have been mounted from underneath.
Of course that appreciation for the part density on the VFE boards only came after it took me two builds on the Choral Reef to get a working board (poor cap size choices, and trying to use too many sockets for the chips). : ^ )