I think you are right Cyberjack, they were probably just being conservative.

Many companies work out that change is crucial to survival too late, but evidently not Victa.
People having to buy 4 blades (2 cutter 2 lifter) as opposed to 2 probably wasn't a contributing factor to Victa's blade decision, would put up repair costs a little though.

I do agree that they were brilliantly conservative

Regards
Tyler