It's a good job no one here had to build an original Schumacher CAT then.
The anti roll bars were a straight piece of piano wire, two ball joints that needed soldering on to it, and a plan and front elevation engineering drawing. You also had to put bends on the ends of the pivot pins and deburr the shock shafts yourself.
Should you be able to throw a kit together today - definitely as the quality standard of modern kits means it is now expected. Even top level kits are expected to do this today.
Personally I got bored of racing when it went from developing your own car (including modifying it yourself) to just buying a kit, screwing it together and racing it.