So I've recently noticed a problem with my 5000 single pedal. The nuts that reside in the middle of the delta hinge (see pic) keep backing off and hence result in some sidewards play in the hinge and hence the foot board. It's very easy just to tighten these back up however they seem to continually come undone. Anyone experienced this before? Is it a sign that the hinge is starting to wear out and needs to be replaced? The pedal is only just over a year old and I'm not particularly hard on it.