I have a 100 plus year old log cabin in Maine. the logs are horizontal. The walls are starting to bow out I installed 2 turnbuckles on iron rods to pull the walls back in. All that did was pull the top log in. Any suggestions? I was wondering about a vertical steel plate on the exterior being pulled in by the turnbuckle but not sure how that would work as the turnbuckle needs to be up high so the plate would just pivot out from the hole in which the iron rod was attached. thanks