I went out and bought 80 grit sandpaper (black type), and contact cleaner ( works great). Took awhile to sand most of the black anodizing off. It is a very slippery coating, and I have a feeling this is the primary contributing factor. I sanded it off from the male post and from the inside of the female portion. When I get back home, I will go over it with my Dremel and a steel brush wheel again.

It is more solid now. However I still plan on doing the following...

1. Try the anti slip compound
2. Swap out the original clamp with a wider clamp

I'll ride it tomorrow to the LBS and I'll report back my findings, and also I'll let Dahon know about what was happening, what I did, and what I think is the primary cause. Maybe they'll correct it somehow for future builds.

Time spent including getting the sand paper, cleaner, and looking for anti-slip compound to sanding, and reassembling...4 hrs.

Besides all this, I still like the bike alot. It affords me the ability to bike on business trips - resulting in maintained good health and outlook (just in case my boss happens to read this). As before, I like the looks, the internal hub, and the overall build quality.

Has anyone experienced this with the silver Radius Telescope Handlepost. Is it bare aluminum or is it anodized also?