Enoki
SOC-14 1K
How long to you think that you can do this before the local engineers whose business you are damaging start to hiring people to beat your crewmen to a pulp as soon as they are out of the Star Port fencing, and also start demolishing the businesses using your services? Locals being shown up by locals is one thing, but you are an outsider showing off. Plus, you are not around all of the time, so that businesses who benefit from your services are in trouble as soon as you vanish.
You are thinking that there might be no reaction to what you are doing, whereas there is very likely going to be.
Probably forever. If the local "engineers" can't make the part, it isn't hurting their business. It isn't as if a starship comes and starts selling nails and screws to the locals. There isn't much money in making one-off parts either unless you can do it with a minimum of labor and time. A CAD 3D machining center could do that.
The locals, knowing that ships come and make and sell the high end parts simply focus on mass producing simpler ones that are in demand.
So, the local rich guy who has some high tech vehicle but needs, say a precision bearing for it, gets one from the passing starship. He still buys staple machined goods from the locals. Everybody wins.
In one case I had an engineer that wanted to see the local blacksmith's shop on a very low tech planet. While there the engineer offered to make a gear the blacksmith was having difficulty copying. Took the ship's machine shop just a few minutes to make what was going to take a week or more for the blacksmith to make and made it better.