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I had though myself generally well informed but only recently discovered these 400 series tripod heads. My primary tripod use is with the Wimberelt MK II gimball head for longer lenses. After buying two ballheads-that drove me nuts I, recently, bought two 410s and a 400. I use one 410 for a Zeiss spotting scope (and what a relief from a ball head!), and the others for photography.
This series of heads, offers, independent, 3 axis geared adjustment. No matter what you pay for a ball head you adjust (often disturbing 2 out of 3) all axis while there's always some kind of deflection/shift at the final point of torque. This defies quick precise framing and reframing adjustments.
Yes the 400's are bigger and often heavier (405 and 400!) than most ball heads but are ideal for fine frame adjustment for landscape, architecture and product photography. The 410 and 405 has a strange QR plate that can be mated with an Arca QR clamp. Checkout these strange looking heads they just may be the best for your work.