Yeah it is really close to perfect for solo. Just did my day 28 horde last evening, actually about the same results as Auger had haha, cept I used more grenades. Man those grenades and moloys are great fun - love the effects of the nades especially.
I'm wondering about steel tools requiring steel tool parts, though. I was lucky enough to find a steel fireaxe like on day 8 or so, but I've been stuck with the iron fireaxe ever since. I found the crucible schematic, crafted steel and then noticed I had to go find steel tools to scrap to get the parts to craft the pickaxe lol. I kinda get it, but at the same time it kinda defeats the purpose maybe. Granted, I did find another steel fireaxe to scrap to get the last few parts I need, and really the iron pick was good... idk, perhaps I'm being nit-picky.
I do love all of those recipes and schematics, especially the books though. Although the weapon crafting ones idk, kinda seems like by time you can read one that you're not perked into crafting a level 1 of that gun is rather pointless, both to use and to sell. Perhaps in some way - by reading one - you can have a chance at learning the next tier of level to craft? Not the perk, just the ability to craft a higher level.