FTC Freexion is finally available for sale, about 270 USD at Maple Leaf Ropes, shipping in early February. Its features seem tailor-made for production climbing. Along with the cam-pinched bollard for minimal drag while ascending it has three friction settings which don't necessitate opening the device on the climbing line to change, to be done on the fly while climbing as conditions warrant.
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They even show a rescue technique they came up with for carrying two climbers on the same device, so clearly climber weight isn't a problem with the adjustable friction. Any climbers too big to take advantage of the apex (WLL 120kg) may have more luck with this.
They use a Camp sphinx for this but looks like it would work with a pinto just the same