Dan.
You have to cater for your customers. But you have to be focused on your own profit. So that you can develop more. Now you must have some good sales data by now.
So Who is buying what. In what volume.
At a tener I'm going to choose a cheaper kit to practice.... But I'm a casual turner so ignore me! Your a wholesaler and who are your customers. Multiple Casuals like me? Or a few pros like Neil and co.
Then it has to be what will give you the cash flow.
I would put your top buyers into a club, and give them the option of the two types and perhaps offer them a discount for an advanced buy. Use the cash flow to develop two models if you can etc.