Thanks. I find this whole area fascinating. It feels like if there was a way to make molded parts cheaper it would open up a large gulf in between "$300 3d printer" and "$15k for one mold and BTW you need 5 molds for your thing".

I do a lot of 3d printing but have run in to the limits quite a few times where I want something bigger than my print volume allows, or I want something water proof, or food safe, or I want something transparent (which can also be used outside), or I want it smoother...

resin printing or finding someone with a big printer... these things help sometimes.

Another trick I have yet to succeed at is using some existing plastic part, or transparent plastic from a soda bottle... Repurposing for these edge cases.