I am in the process of fitting skirting boards to a new build however as you enter the new room there is a 3 inch step up into the room. If possible I would like to run skirting board at an angle to create one continuous line between the two levels. I have attached a diagram in case the above doesn't make sense. 1. is this possible? 2. what is the method for measuring and cutting the skirting board to fit.