Bed "Flatness"

[gianluca_g]

I would say that having the bed of the machine nice and flat is ALWAYS a good idea :)

[JAZZCNC]

If your mostly profilling then it's not so critical but if your pocketing or engraving or chamfering then it's absolute must.
Personally I like my bed flat as it's the foundation for any work under taken and that can change daily so I always surface any spoil board first time around then access on type of work and hammer it's had.!

Often My bed is divided into 2 halfs one has a spoil board that gets chopped to bits for profiling etc that isn't critical on edge angle and the over half is uncovered which I use for accurate work and Dont cut thru.