Thanks for the feedback.
I do already have an acrylic front plate, and I have been recently working on top covers.
I found a couple cardboard boxes that fit very well (one from my new Siglent function generator and one from Amazon). They definitely help with ABS, so I assume they will with PC too.
I also just (yesterday) found a plastic box (for storing papers) that fits really exceptionally well too, and is more sealed, so I am going to play with that.
I did not think about preheating and letting it sit for a bit, though. That is a great idea!
So, thanks very much!
I hope someone else knows more than me but I can tell you one thing for sure - enclosing the printer (even just the front) will help quite a bit. Just throw a big box on top, cover the front with clear plastic and let the bed sit at 100C (or hotter) for 20 minutes to get all the air up to around 40C before starting the print. Having the air at 40C instead of 20C cuts the shrinkage almost in half.
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