I have a Amish log cabin w/6” thick x 10” tall logs stacked on top of each other .I want to go up 4 logs higher to make lofts into bedrooms and add head space. Its 40′ long x 16′ wide .the center 25′ of one wall is leaning out from the weight of the existing roof. Its leaning about 2” on the top 3 logs.The logs are joined with a series of threaded rod which have probably bent.Should I have the center of all these logs replaced and straighten out the wall that way or is there a (turnbuckle) s