it will not matter economies of scale as the tinkerer cannot redistribute it. The tinkering is done in product already sold, like after market car parts. The ti

it will not matter economies of scale as the tinkerer cannot redistribute it. The tinkering is done in product already sold, like after market car parts. The tinkerer can tinker with as many tractors as he wish, even for money, but those modification is done with consent of owner on something that he already owns. If i brick something in process i should be able to replace it with factory stuff, like in case with if the said tractor's axil gets broken