Hairpin rotation w/ bookending dynamic

[address@hidden]

Hey all,

I'm working on a score and I can't figure out how to rotate the hairpin about 
the pianississimo -20ish degrees such that the sforzando moves with it.  Before 
measuring the distance in horizontal staff space of the hairpin and working 
with tangents to get the correct padding override (uuuggggh), can anyone 
suggest a quick and dirty way to slant the hairpin downwards and have the 
sforzando move along with it?

image @ http://www.apollinemike.com/hairpins.pdf

~Mike