I used an Ironsounds 18 watt Marshall clone circuit board kit and used some old iron I had laying around. It really didn't take too long to wire all the resistors, caps,diodes and such to it. It took longer to punch the bagillion holes in the baking pan and I also bolted in two two inch wide by 16 guage aluminum flat stock into the pan to stiffen it up and act ad a grounding plate. It buzzed like crazy on first fire up but after reading around I found that I needed to create a "virtual center tap" for the filament winding (the PT I used had no CT on the filament winding). After doing this and neatening up some of the grounding I fired her up and tested some voltages as per the instructions for the kit. Lo and behold all tests were within a percent or so of the chart they had for various test points. Then I plugged in my Les paul and turned it up. BLISS!!! I also got the wattage control option with this kit and will certainly add the FX loop kit too!!
BUT I BUILT MY FIRST AMP!!
Also it is noticable that the layout of this kit makes it inherently quiet as the ac wires remain so far from the signal path with a modicum of care. Also I had a chance to put this amp on top of my Marshall 4x12 and ran it flat out dimed for a good while and it never hiccuped and sounds excellent. I also if I were to do it again. I'd overdrill the tube holes (and more accurately centered ;-) and put a grommit there too to neaten it up a little bit. I also need to wire in the second input ( I wanted to make sure the amp worked first) ahd add a second speaker out in parallel with the one in there now.