Really. Do shims of this size wiggle?I have has issues with a 30.9 to 31.6. Seems it's so close in size that the lower end of the post can wiggle a bit down in the frame and touch the inner wall. This may result in "groaning" or "Moaning" noises...Is it hot in here?....seriously, I took another shim and cut the upper lip off and put two (2) shims on the post. Problem solved.