Thanks Ritchie, I nearly used them for my last engine too.
"B" pistons as in 35mm compression height is what Alex was referring too though.
Whoops missed that part
![Wink](http://cal-look.no/lounge/Smileys/default/wink.gif)
I was just ordering some AA stuff and saw them and thought of this, most haste less speed next time
![Grin](http://cal-look.no/lounge/Smileys/default/grin.gif)