You are, of course, 100% correct. Can't quite believe how I missed that....
Many thanks for the lesson in simple trigonometry.
The question now is, how much of an increase is too much? And would the money be better spent on having some kind of bodged spacer made up to extend the shock, while spending the rest on a mag/carbon front wheel?
And I love the idea of hi/low speed damping on the penske shocks. Can't quite work out how it manages it, but I'm sure you'll be along with an answer shortly.
Cheers,
Ali