ThorUSA write: "longer seatpost ( as long as it is 33.9 mm ) are available
Aber Hallos Stem extender are available ."
Thank you for your suggestions.
Today at an independent Brompton shop in Thailand the proprietor and I discussed seat posts, er at length. He has an extended Brompton steel seat post in stock (Flamingo one is aluminum. He commented to staff, extending mine - 'feel this, it's thick eh?')
The Brompton one is only about 6 cm longer as I recall. I learned that the design is not identical to Flamingo and it would work only if I had the bent lip cut off. Plus he said something that I find hard to understand the purpose of and even believe - that it is inserted up rather than down. And the end that would have a saddle attached looks entirely different than the Flamingo - the diameter narrows. Huh?
Titanium version by third party manufacturer in Thailand BROMPIFICATION is available. But over USD200 just for a seat post? Strikes me as fetishistic, like I am part of cult of luxury sportsman. Nope - just want a bike that runs. He didn't solicit me to buy it, I inquired.
From the two bike shops I have seen so far, Thailand strikes me as much more sophisticated than Malaysia. Surprises me.