Originally Posted by
bulgie
Maybe add Weyless ('70s) to the list, though they're rare nowadays. Very lightweight. I think they came in 27.0 but I can't swear to it...
There's one on Ebay from the US for $270:
https://www.ebay.co.uk/itm/265657567141
192g apparently.
Fairly sure it's not worth it

Does adjust from the bottom though.