Its unpayed work.....if the supply works, and the cust likes it......it "might" go ahead to something....but unlikely.
But i wish to build it anyway....to see how it goes........so at the moment, yes, its just a hobby.
I have not been payed a sausage to date, and dont stand to be......the cust has the full schem and layout anyway, because i gave it to them to try and get them interested, so neednt pick me for the work anyway....even though i designed and layed-out it all.
I actually want to build it anyway, regardless of the customer.
As you can understand, with Chinese import power supplys available, the customer has other options.