Quote from: RV Squirrel on February 24, 2024, 10:51:38 PMI finished drilling the holes for vertical bolts. At this time, I think that I will refrain from drilling the holes for the horizontal bolts that you (Charlie) used. This may be a good idea, but at this time I'm leery of drilling additional holes in the frame. If I have problems again in the future, it is a comforting thought that I can use this approach.Adding holes near the end and near the vertical center of the frame is zero risk. There is essentially no stress in the frame member forward of the coupler. Note that once the coupler begins to bend such that you can see it it will be almost impossible to straighten it. You will be back to starting over with a new coupler.