SuperTigre was the king of the "squish band of the month " club. Simply amazing, the different setups done as running changes .
Having tried them as they appeared and swapped em when possible - I found the clearance to be less of an issue - but compared against ratio of band to chamber, it changed.
OS used more band area to chamber than initial ST engines and typically the bandshad very slight taper upwards
On the teensy engines - Cox etc., the chambers also went into trumpet and some racing stuf into double bubble.
It all looked like a clustr f--- to me.
There never appeared to be a real "This is the best" configuration as the fuel used and rpm really determined which worked best .
- the pressure in the cylinder can be increased easily by using tuned stuff which will pack the combustion more. So the ideal head configuration changes again-