I observe that to truly have leg extended my seat post has to be 5-6 inches beyond the safety mark, not just the 3 inches I already have it extended. I am not confident riding it with only 2 1/2 inches below the lock. A previous poster mentioned how he's 5'11" and on his Brompton *he* doesn't need an extended seat post. Well, A Flamingo is not a Brompton. Maybe in some ways it is different in dimensions. Maybe the gear wheel is higher. I don't know.

My idea now is to take the advice of a previous poster and try a longer seat post. But instead of spending what $250 on getting a titanium extended seat post shipped from Bangkok, to jerry-rig it.

My question is is it better to insert a slightly smaller diameter piece of titanium or aluminum tubing *inside* the original, attaching that by welding. Or to add the very same diameter and weld thickness to thickness. Internal attachment sounds easier to do and stronger to me.