Argh damn the lower tensioner!
Lol okay cool, I'll consider going for a headskim of something like 1.5-1.8mm then, as I don't want to be on the limit of the lower tensioner, as this should roughly still give a comp ratio of 9.5+1.5=11 to 9.5-1.8=11.3 using your rule of thumb, while not having the lower tensioner fully extended.
