Gene, probably hasn't been mentioned, but many of the guys make a custom buss bar for between the caps. I find the original is adequate, so I use it. However, I drill extra holes for the extra ground wires. Two holes on either side of the slot, sized to each hold two 16 AWG wires. Then I steel wool it to make it shine, then clean with alcohol. A little bit of flux and it then solders nicely. Plan ahead and drill before doing any soldering. Also note how the wire enters the slot from behind, then is bent over the top. Takes a lot of planning on how to fit all those ground wires.
Also, the S1 transformer wires are enamel coated solid core magnet wire. PL probably dipped the ends into a solder pot to burn off the enamel and tin the wire ends. If you change the length of them, scrape the enamel off with a Xacto blade or something similar before tinning them. It might take a couple scrapings and tinnings to get them correctly tinned BEFORE you solder them in place. A little flux also helps here, not much, just a little.