I've finally decided to build one, based on this site. I'm just wondering if all you guys followed his EXACT measurements. They just seem a little off to me. I measured my tub to be 27.5" long, and according to his instructions the length of the frames will be exactly 27". 24" piece plus 3" from the two 2x2's (1.5x1.5) on each end. I've never heard any complaining about his plans, or about anyone altering them at all, so I assume you all use those plans and they work fine?