Adrian, we're working on something, but it's with TC at the moment.....I think designing a whole new SID is out of the question because of the political/environmental aspects.
From the tower's point of view, we'd like to see a formalisation of the current status quo, F/F 220 6A, so that GMP can give that to the a/c instead of a CPT SID and then Air (S) having to amend it.