as for makin calls no I don't think u need to do it can always stick with your hard woods or exotics ,,, if your wanting to get into spalted woods and some burls yes u will need to stabilize the wood ,,, I not only like making calls but will say iam addicted to wood lol iam all ways looking for that next piece that's going to knock your socks of on looks and with out stabilizing would never be able to turn to the wood with out it coming apart and making a good sounding call and weather its calls pens or bowls stabilizing help them woods other wise u couldn't turn ,, I got woods I just stare at at that I hate to turn they look so good LOL