The Zwaardvis pedestal for my settee table no longer tightens. Inside the lower section I found the broken piece of plastic which used to push against the upper section to hold it in place. I emailed Zwaardvis about a spare part, but I haven't heard back. Has anyone had this issue? The only alternative solution I've thought of is to put a longer threaded rod on the locking knob and drill holes into the upper section for the rod to go into at the upper and lower locations.
1989 MKI Tall Rig #1013