I am going to buy a fleshing knife and beam and had a few questions. First I have thought of building the beam from PVC. well my question is it will be rounded the beams I see for sale are flat is there a reason to use one over the other?Is one bettere than the other, is it easier to cut hide with a rounded? And The fleshing knifes I see are they basically the same dont want to spend a lot of money, do they all have a dull and sharp side? mand how do you sharpen ? thanks and have a great day!!