Thanks for the info
It has been reported ;
Ported pro stocks were stiffer with a diffferent engernering code
Isner had his frames tubed at the top
First I heard of the groves that did not come from wear
@bleno567 , @Harry Wild
O3 Tours have been out in Europe since at least 2020 in 310 grams & the 290 gram which I ordered last year
27.5" O3 Tour yes please.
I have a standard Ultra in my collection.
I did not count the metal weights on the sides of the Ultra, only the mold having the "invention" whih could be placed under the patent protection that the picture shows.