Was having clogging issues so I thought I'd replace and get the mythically good capricorn tubes. This is a good sign that I needed to.
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and even if it were worn down that much it wouldn't cause any problem as the entire tube is made of the same slippery stuff, it's not a coating.
Would a larger inner diameter not cause the transmission of movement to be less direct due to bending and coiling inside the tube? This is probably mostly an issue in bowden systems
The hysteresis that the tubing imparts on the movement of filament is negligible at best. We're talking fractions of a millimeter of difference; and it's something that can be accounted for in your retraction quite easily. Remember that this hobby is LITTERED with people trying to sell you stuff. Be critical in your observations, because even most YouTube channels will tell you that [X] thing is GREAT because if they don't, they stop getting free shit.
Did you measure that? Would be great if it was only fractions of a mm.
The tubing diameter difference is only fractions of a mm, and now you're talking about a 100mm length along. You don't need to measure it, it's literally in the dimensions and tolerance info of the product.