Keep the same machine booked for the whole appointment! We have two LHR machines and when a client is booking multiple LHR areas (i.e. bikini and underarms) it books one area with machine #1 and the other area with machine #2. The provider uses the same machine for the whole visit so it should be just one machine per client per appointment booked. That way someone else can book machine #2! And we don't have to manually edit every single visit to be with one machine...