A few unconnected thoughts:
One of the things to keep in mind about these guys having stuff just this side of homemade is that a) what they had worked well and b) did not need to be replaced for a long, long time. A simpler, more mechanically oriented world, where any number of things could work: cheaper, easy to modify or repair, and less financial turnover/waste of resources. Still today, the only piece of durable equipment I have ever had to replace in my own b+w darkroom has been my digital timer; everything else will probably outlast even my desire to use it. In our age of rapid obsolescence (do you espy the garbage can at the end of the checkout counter? it's for what you just bought!), it's hard to imagine this sometimes.
There is a priceless letter from Stieglitz to Weston congratulating him on getting the Guggenheim, on being able to upgrade his gear, and then spending the whole time giving this account that veers between comedy and self-pity about his own setup, from sagging bellows held up by a string tied to the ceiling to fixing his prints out on the fire escape. I highly recommend digging it up, although I don't remember where it is.
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