Post the BOM IN-TOTO before you Order anything. Then AFTER it's vetted for completeness, current parts vs. obsolete, better parts that have come out since the BOM was made, etc., you can make the order and save a lot on shipping.
Good idea on the DATA Sheet's. We do suggest this. Pin order is generally Pins DOWN, Printing facing you, and Pins ordered LEFT TO RIGHT! on the TO-126 transistors the printing is hard to see, so use light from an extreme angle with a magnifying light. In Most cases the seam around the top, sides, and bottom is offset front to back with the seam toward the back, behind the center line. But I've seen the opposite so doublecheck. Q1 thru Q4 on the Main Amp board have to do with the offset (I'm having a brain fart!) so if your meter has a hFe setting insert the transistor correctly in the meter holes and let it sit for a minute (the transistors are highly sensitive to temperature, even your body heat will change the readings, so let them sit a minute or two each in the meter to settle down. Then write the number down, and try to get 4 close together (close meaning 10 or less).
Mark the Fixer DID note in one of the later BOM's the trim pots for the bias and offset. Use those numbers. CENTER the adjuster BEFORE INSTALLING. DO THESE ABSOLUTELY LAST. Stick a note on the amp board and tape it on. That way you won't forget. When you get ready to fire it up, let us know 1st and we'll outline on how to "TICKLE THE DRAGON" on a DBT, then how to readjust before and after plugging into the wall. The values change between using a DBT and the wall straight so there is a possibility of smoke release if you don't do the procedure right.
Larry