If it's not too late, I got the IEC with the fuse holder built in. Less wiring! I spent hours trying to figure out why my voltage (D) was so high. I finally swapped the 6922 tube with a 6N1P, and the voltage dropped to within specs. Thought I had a bad solder joint or component. What a relief. Be sure to mount the big ol' 1K 5W resistor an inch from the board (and everything else). It gets hot!!!
I plan on installing a standby switch
http://tubedepot.com/p-dpst-3way.htmlto let the tubes warm up before feeding the amp the full voltage. Not required, but worth a Google.
Have you ever soldered before? If not, and you would like to practice on something, you could buy a prototype board like this
http://www.ebay.com/itm/Vacuum-Tube-prototype-project-board-8-pin-tubes-/1407228...Solder pieces of wire, unused resistors, etc, 'til you feel a little more comfortable.
I'll to get some pictures, if I can find my wife's camera.
Mike
Oh...I wish I hadn't sold my '71 Chevelle SS 454 when I was younger, but...