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Thanks for your question.

The concept behind this idea is that friction is minimised (as you have pointed out), that's how ball bearings work (point contact), but they obviously use harder materials. I hope that one day we will be able to have a great printable bearing material, although Nylon is pretty good.

Until then you can up the flow rate on the fly while printing so you can get this to print a little tighter than the design. The veins will then flex outward and over time as friction occurs they will flex inwards to keep the bush from wobbling due to wear. I guess there will be a time when the bearing is spent, but I have no idea how long that is.