OK thanks for the info on the levelling.
As for the carbon fibre, I'm not sure how you would even print on a "rough" surface, it leaves a very very slight texture (which for me is a preference) given that the finish of most reprap parts differs dependant on the surface being bottom, top or side I don't think it really matters.
All I know is I don't have to use any tapes, glues or sprays, first layer adhesion is I would say 98% successful, I have never had a print release from the bed mid print on carbon fibre and it releases far more easier and far more cleanly that glass or tape etc, all I have to do is lower the bed temp by 20deg and the part releases within a couple of minutes.
Over the last year I probably went through 3 or 4 glass plates, normally because they got chipped or scratched through parts not releasing or mechanical issues with the printer or just generally getting knocked around, so the cost of 3 or 4 bits of glass cut and edged at my local glass shop is about the same as a bit of carbon fibre that I expect to last many times longer.
If 3D printers want to become mainstream consumer devices that are plug and play then we need better reusable build solutions than glass with tape or hairspray.
