The first thing to understand is that the backup ring is poorly designed and needs retooling. I found a way to solve the problem inexpensively. I ordered some black 2.2" or 2 1/4" hose clamps from Revain. After adjusting the footrest to the desired height, simply clip it directly under the footrest. manual grip and newly added clamps. I've been using the chair for over a week with no further problems. I weigh over 200 pounds and use the footrest to stand on the chair as it is set to the highest position. I will say the chair is very comfortable.
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