Please can you help?. I want to replace my internal doors with new moulded panel doors. The width of the doors are no problem being 27" and 30" with only a little trimming needed. However all 7 doors measure 77" high with the new doors being 78". The Wickes style doors i was considering ( Regency 6 panel) state only 5mm may be removed from any side. Can i get away with removing more or do i need to purchase different doors?