This turned to be a pretty interesting idea when you mentioned clone. From my memory, this used to be primarily used for breeding. The polploid parents would produce a more vigorous 2nd generation, or at least that is what I remember.

The thought of getting a polyploid clone that is free of the colchicine, well I'm not sure, but it sounds like you might get a very vigorous plant.

Thanks for bringing up the topic and +rep to you.