Watt Bike Atom Cranks

I’m thinking of getting a Wattbike Atom for zwift, from what I’ve read some of the initial issues have been ironed out re ERG mode etc.

I’ve had issues with my knees in the past and the only thing that has improved it is 165 cranks. Does anyone know if you can swap the cranks yourself after buying a wattbike? I’m thinking along the lines of 2 left hand shimano cranks. It’s a bit of a deal breaker for me, if not are there any other options I should consider? I know the wahoo bike will do 165 but I don’t know if I can justify the expense!

You cant swap them out, they are 170mm.