Here is my collection of true extents of Grandsire Doubles. As for the other parts of my collection, four calls are used - bob (b), single (s), extreme (e) and bingle (g) along with plain leads (p).

There are more callings for the extent than you thought, nineteen in all. Thus there are 160 touches with rotations. Of these, only two callings (10 touches) use conventional calls, including Roan's original six-call:

 3 120 spsbspsbspsb
 2 120 spbpbpspbpbp

 3 120 sssesssessse
 3 120 sbebsbebsbeb
 3 120 pgbgpgbgpgbg
 3 120 pgbepgbepgbe
 3 120 gggegggeggge
 3 120 gbebgbebgbeb

 2 120 pgpbpbpgpbpb

 1 120 sssesssebsbe
 1 120 sssebsbebsbe
 1 120 spsbspgbgpsb
 1 120 spgbgpgbgpsb
 1 120 sesesbsegesb
 1 120 sesegbgegesb
 1 120 sesbsegegbge
 1 120 segbgegegbge
 1 120 gggegggebgbe
 1 120 gggebgbebgbe