A few more construction hints: 1) The two files xxx_via.JPG show the locatin of the vias for the two boards. You will need to insert jumpers through the boards in these locations. 2) The pots are installed from the bottom side of the boards. This will cause the set screws on the knobs to NOT align with the flats of the shafts. I do not find this to be a problem. A few assembly notes for the Distribution Amp. board: 1) To more easily mount C1 and C3 I suggest the following: (a) reverse the positions of C1 and C2 - this will give you more room to solder the neg. side of C2 (b) mount C3 so that its + terminal is on the "T" of the V+ bus 2) If you are NOT going to use a switch you will need to insert ten feed thru jumpers for the two buses under the pots. The bus connects the output of the input amplifier to the inputs of each of the Distribution Blocks. 3) If you ARE going to use switches you will need to install H2, H3, H5, H7 and H9 and cut the buses (four places) under the pots. 4) The headers can be mounted on either side of the board. The side you pick should be determined by how you are going to mount the board. 5) You may want to trim the pcb a little on the side where the pots are mounted in order to enable using the full thread of the pot to be used for mounting. If you insert some washers on R9 and R24 (the end pots) this will not be necessary and the shafts will not protrude as far beyond the front panel.