Since acquring my late 90s Aeron, most of the common parts have been replaced (sunken seat pan, plastic clamshell hip bolts, torn seat back, fixed arm rests, wobbly castors, torn lumbar support, seat pan edge foam insert) but whilst the gas lift had always been sticky and the chair wobbled, this was put off due to the reported difficulties. However more recently this was no longer an option to defer replacement since the gas lift would no longer operate, being stuck after lowering. But how easy and what options for parts are available.
