I would never use a pair of force fins for any diving where fin technique is needed... IE reefdiving, wreckdiving, cavediving... The only place where I can think that fin technique might not mess things up would be wall diving, and even there it would be useful....
Try doing a frogkick in those.... I would match my jetfins with a frogkick to anyone with forcefins doing whatever kick they wanted for distance on air consumption....
Try doing a frogkick in those.... I would match my jetfins with a frogkick to anyone with forcefins doing whatever kick they wanted for distance on air consumption....