I also love, and play, vintage gear, but due to re- occurring back problems, I have tried to shed some weight. I've found some pics of my earlier attempts. Cases ,( yet to be covered ) are poplar ply, replacing manufacturers boxes made of lead. Pre-amps ( SVT,s ) are Ebay purchases, with added power supplies, built by myself. Power amp to taste, depending on gig, but I've often used a B&O 500 watt module, bought from Bigwan, or Hypex modules. I've also cloned some speaker cabs in poplar ply, but often the easy way to lose weight is to go for neo's. Certainly work in my Ampeg and Mesa 2 x15's. I'll try to list recent, more finished photo's, when I can work out how to get them off my phone .