Another pro tip from me for people who are new to 3D printing: unless you are in dire circumstances, ask yourself if you're about to print something that you could have bought for a ridiculously small amount of money.
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Another pro tip from me for people who are new to 3D printing: unless you are in dire circumstances, ask yourself if you're about to print something that you could have bought for a ridiculously small amount of money. There are a lot of times you could have just NOT spent 20 hours printing something.
For example, you rarely need to print a tube. PVC pipe is extremely cheap. Use it. Which brings me to a side version of this same point: ask yourself if you could, instead of printing a large object, print smaller objects that would convert something you can buy on the cheap into the thing you're trying to print. Maybe instead of printing an entire storage box for something, you can print an insert that fits into a box you have that holds those things. Back to the PVC thing, instead of printing a large thing that's 90% tube, just print ends that can attach to PVC pipe. Instead of printing a big self waterer for a plant, you could print just a screw on lid that will convert a plastic bottle into one. There's a LOT of prints out there that will turn everyday objects or fairly standardized global products (this is why IKEA is popular with 3D print types) into new things.
Now I'm not saying never ever do this, if you see some special carrying case for something and you like it and want to print it then go for it! But I've met a lot of people who just see a thing, print it, and don't really consider that they could have easily avoided a large percentage of the print by spending $5 or less on some PVC pipe or even grabbing a water bottle for free, and spent that time and plastic printing something else (and for structural things could have had far more strength than a pure 3D print would have had anyway). It's always worth thinking about if there may be a better way to go about it. Sometimes the best 3D printing project results come from *not* printing everything.