Maybe I'm not smart or patient enough to put together my own parts and part list! My first build was a 5f2a from a 5F1 board kit, my second was a BF PR from a Mojo kit. In the tweed, I just had to source a few extra parts, and a bigger board, and chassis / cab / speaker. In the PR I 'upgraded' a ton of components, reworked the bias, added shielded cable, and so on, and felt I'd really gone above and beyond the kit. But recently I've been looking back at Mojo's two big parts organizers with their dozens of labeled bins. Why? Well, planning a future 6g2, nobody seemed to make a kit, and the otherwise-solid Mojo chassis is punched for an oversize PT and has the power / fuse holes wrong. So why not source a chassis and cook up my own BOM? I had the tubes, I knew what speaker I'd get anyhow, and I knew several custom cab builders who could help me out. Issues: 1. Trying to keep shipping charges to a minimum, I *still* find I'm ordering from AES *and* Mouser even though I'm getting 97% of the parts I need from Doug Hoffman. And that's before I pay for separate shipping on the transformers, speaker, and cab. 2. Making a list and checking it twice (OK, like 10 times) has been a slog. I think I'm good a lists, Excel, and databases. I went over and over the layout and schematic with a highlighter, etc. But in the end all this took me as long as all the other planning put together, and was a lot less fun. 3. I figured it'd be fun to use the existing parts I've gathered in my builds and other projects. But the biggest source of frustration has been trying to inventory and check off the parts I already had. They were fairly well organized, I thought: CC resistors in one bin box, MF in another, caps in a third, pilot light parts in one baggie, pots in another. But making sure each one was the right spec became like an infinite game of Concentration. Is this a 6v bulb or a 12v I got by mistake? Why are Sozo, Mallory, and Dijon caps all labeled in different units? (Just grateful I'm not using ODs.) How come labels don't stay stuck to resistors after you measure and label them? And so on and on like a repetitive bad dream. 4. All that said, I found after I clicked my BOM into Doug Hoffman's shopping cart (which is very useful for this purpose), I still found things I needed in his 'scrolling' picture index. Wha? Some of these had been on my 'all' list but didn't get sorted into the 'need' list, others (a cable clamp) were on my need list but hadn't made it to the order, and several more (bear claws, Doug's nice shrink tubing) had never got on the list at all. So much for my thorough process! 5. Finally, this morning, after checking and cross checking all 3 parts orders and sending them off, I immediately realized I've been using shielded cable from a prior build and have almost none left. Doug has the kind I like, but had I ordered any? Nope. Lots of you can chuckle at this, as I see you out milling clear pine for your cabinets and designing / cutting / drilling your own custom boards. Hey, TDPRI is full of complex, novel circuits built from parts found in dumpsters. YMMV. But when I do it again, I'll be giving extra weight to possible options to 'build out' from a pre-existing kit, and I may just resign myself to ordering new 85-cent resistors instead of trying to re-catalog and re-test every one in my parts bin.