This is a great idea! Maybe you could also think about adding some features for 3D modellers. For example, they could upload preview models and hide the print-ready ones behind a paywall. So the user could buy not only printing services, but also the models themselves. See this thing by nostr:nprofile1qqsr9cvzwc652r4m83d86ykplrnm9dg5gwdvzzn8ameanlvut35wy3g4h5cp7:

nostr:nevent1qgsr9cvzwc652r4m83d86ykplrnm9dg5gwdvzzn8ameanlvut35wy3gpr4mhxue69uhkummnw3ez6vpj9eukz6mfdphkumn99e3k7mf0qywhwumn8ghj7mn0wd68ytfsxyh8jcttd95x7mnwv5hxxmmd9uqzq6t29k7c8sfy99vk26lx85yxcqmqr2uesj9uk3umvtgelxfgtvvjsahy6a

Maybe you should talk.