Thank you both for the great advice. I did end up using the Template functionality. Originally I had set it up as a symbol and was frustrated by how locked down a symbol was, hence my desire to load my own sketch. Eventually I figured out I could also define sketch templates instead of symbol templates. I added these to my am_customize in my SDSITECUSTOMIZEDIR
Code:
(oli:sd-am-define-annotation-template
:type :SKETCH
:name "Notes - Plastic"
:path "/Notes"
:image (format nil "~A/VersionNeutral/Annotation/NotesPlastic.bmp" (oli::sd-sys-getenv "SDSITECUSTOMIZEDIR"))
:2d-file (format nil "~A/VersionNeutral/Annotation/NotesPlastic.mi" (oli::sd-sys-getenv "SDSITECUSTOMIZEDIR"))
:action "am_load_sketch_multiple")
I do still wish I had per sketch control of the Adjust point, so some could be center adjust and some be upper right adjust.