Your explanation is what I thought I understood - it was your statement that "internal and external ramp changes are not interchangeable" which had me wondering if I was missing something (other than boot builders overdosing on ramp).
I feel like I would to try like more than 6 lift on the front, but as you say I run out of cuff travel (Which had me thinking about the AT Backlands and how much extra forward lean they might provide, but I digress).
The ShredStack9™ could offer 9 lift/3 cant if two 6 deg were heaped - the lack of oxygen may become an issue.
Appreciate your reply. Recess is not be meddled with.