3T Rigida Team fork experiment:
Tapered 1.5", 46mm rake, 367mm axle to crown (3mm shorter than the 370mm ENVE tapered which is advertised as 367mm).
The tire clearance above tread of a 25mm Schwalbe Ultremo ZX mounted on a 23mm rim is tight. 3T product manager said this fork would accommodate a 28mm tire, but not sure about that. I'll need to test it with a 28mm Continental 4-Season, which seem less tall but wider than the Schwalbes.
Just wheeling the tandem around the house with the Rigida fork feels less "floppy" than with the 43mm rake ENVE. ie: handlebars don't fall over to the sides nearly as much.
Ride feedback
TBD.
Album of the above Rigida photos is available here.