It seems that the coach roof would also need modified at least on my J-30 since there is a raised lip around the entrance for the mast on my J-30. While on the subject of turning blocks I want to remind everyone that they should remove the turning blocks and inspect thier mast in this area. My mast had a crack 3/4ths of the way around it in this area. The crack went from one turning block mounting bolt hole to the next - to the next etc. It was hidden by the hardware and I only discovered it when I removed the turning blocks to paint the mast. I can't believe I am the only one that had this problem!
