Dane,
I managed to get Parallel Guide for the TS 75 in the SYS 5 at an angle on top of the saw, much like what you said, but when I close the lid, the Styrofoam spacer in the lid hits the Parallel Guide so that you can't close the lid. Clearly, the Parallel Guide for the TS 75 was not designed to fit in the same manner as for the TS 55.
What are you doing for blade storage in SYS 5 for the TS 75?