A single-boom steel frame will have substantial flex for heavy rider to offer quite a bit of cushion. Once you go to the oversized aluminum tubing or multi-tube steel frame the cusioning effect is diminished or eliminated. One of the reasons I look for bents with a single boom steel frame.
Also I want to immediately take off skinny road tires and put on some monstrous 26x2.5 MTB slicks like hookwarm or similar (rebuilding the wheel on a wider rim if necessary). Yes, that will add some rolling resistance but with a 5304 hub in the rear (and associated losses) the effect is irrelevant. But it adds another restriction to bent selection - the frame must have enough clearance in the dropouts for such tires.
Also I want to immediately take off skinny road tires and put on some monstrous 26x2.5 MTB slicks like hookwarm or similar (rebuilding the wheel on a wider rim if necessary). Yes, that will add some rolling resistance but with a 5304 hub in the rear (and associated losses) the effect is irrelevant. But it adds another restriction to bent selection - the frame must have enough clearance in the dropouts for such tires.