have checked the fence and it is indeed about 1 mm out over the whole length using a 1m metal ruler
this is in the form off rocking at the center so if you transfer your hands from one fence to the other you would move the work off the cutter by around 1/100 of a millimeter
now easy solution pad out one off the outer fence surface 1mm from the casting giving a dead flat surface
Yes its an easy fix but the point is you shouldn't have to.
I wonder if the Advert said your fence may be up to 3mm out of accuracy and you will have to fix it yourself If you would still have been prepared to spend the same money on it..I suspect not
I do get why people buy them , Lack of time or inclination to build their own or they simply cant be Assed to do so etc. but for folks that ask should they buy or build then for me I will always advise build.
1. You make it a size that suits you Table mounted or free standing
2. You can make it as fancy or as basic as you need
3. you can put the dust extraction that you use at home wherever you want
At the end of the day you will have a table that suits you and your methods better that an off the shelf one that needs fettling before it can be used