NK, have you got any pix of your Victa bases with wheel conversions done? I'm sure others would like a look.
Have you considered attempting to fix or replace the carby? Did this come with a catcher?
That mower looks in good nick. Might be worth fixing.
It's several steps up from a Lawn Beetle -except the motor.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!