I think we could do a USPS Priority flat rate box at the small size, which is still around $25.
The 150K resistor can actually vary quite a bit in value. The maximum resistance that I would recommend would be 330K, and the minimum would be 120K. At 330K, a 1W resistor is OK, at 120K, a 2W resistor will be necessary.
If I can get the shipping for $25 then I'll just get a new C4S kit and not bother getting any replacement resistors. How do I go about ordering a new C4S kit with the $25 shipping?
Quick question regarding the Output Transformer Kit: On page 14 it states, when discussing the wires leading from the binding posts to the boards: "Carefully confirm that each black wire is aligned to its respective transformer". How I do I know which transformer each wire should go in to? My kit came with 4 black covers (rather than 2 black and 2 red) so I can't say "the red/black side goes in to the left/right board". It seems to me that it would make sense if the black wire from the left binding post goes in to the left board, and the right in to the right, but I just wanted to confirm that.
Whilst I'm double-checking things, the picture on page 8 has the resistor in the reverse order that the bands are noted as. Do I do that for the resistor that I use? I've got it going "brown, gold, yellow, black, blue" when the board is the right up, from left to right.
Thanks, again, for all the help you guys have provided!