I have a Paasche VL, Badger 100 XF Sidefeed, 155, 150 (with large, medium and fine heads), 360, and an ancient Thayer & Chandler Type A sidefeed.
I bought the two sidefeeds 2nd hand, uncleaned, but with spares. I have no idea of the age of the T&C, but it sprays the finest line of all my brushes, based on a comparison I did the other day with some GS acrylic, at 20psi. I'm not saying I'm not going to use other brushes, but I intend to use the T&C and Badger 100 for enamels, and the others for acrylics, because the T&C and 100 only cost me $25.
My advice would be to look for a 2nd hand, high-quality brush. I suspect (but I may be wrong) that the T&C might have been constructed to finer tolerances than today's brushes.