I just finished up my first scratch build (I did one kit a few months ago). I got the 5e3, and my friend got the Supro (another 5e3, I know). The 5e3 has robrob's NFB mod, tube/ss switch, pre-phase-inverter master volume, and "Lead channel" mod. Thanks a million to rob for that, I'm extremely pleased with the results. The 1624t is based on the first version of the amp, with 6v6 tubes and a grid-leak-biased input triode on the non-trem channel. I replaced the single tone control with the dual-control from the 4th version of the amp. It also has the rectifier switch. Here's some pics of the finished product. I'll post some pics from during the build once I sort through them all. The lighting in my basement isn't great, so I'll probably take a few more pictures of them when I get the chance.