just bought ome of these myself
NOW WISH I HADNT
Same problem as you on the switch, it is faulty.
Contacted supplier they sent new switch out straight away different design from the first and that works.
Issue 1. the cast iron bed is not flat !!!! even though it has been surface ground by manafacturer it dips in the middle by 1.5mm
Issue 2. The sliding table does not match the cast iron bed and does not fit in its runners correctly, going ti try opening up the mounting holes of the runner guides to see if that will let sliding table sit down correctly.
Issue 3 Guide fence is a very poor design, had to bolt a brace bar on the back of it to improve, very fiddly to set up.
Alot of money for something poorly constructed
NOT HAPPY WITH IT AT ALL