hi julz,the 55mm cut will be fine lots of doorways are this tight to the wall that i have done its just the finished trim that wont look right imo on this one
check the straightness of the wall vertically at door edges and if large voids are there show the customer these will be highlighted by trim work when you flush the tiling off
check the straightness of the wall vertically at door edges and if large voids are there show the customer these will be highlighted by trim work when you flush the tiling off