Plan looks good, but I'd suggest to review the tape GFS logic once again. Why? Because it’s designed specifically for a case like yours when you what a full backup to be archived to tape. Kindly, take a look at GFS Backup to Tape article
I don't use the GFS is that the backup tape job schedule would seem to schedule two tape backups on the Friday
When GFS schedule for weeklies and monthlies overlaps, backup goes to the media set with longest retention (so in your case backup will go directly to monthly media set bypassing the weekly)
I didn't know how to control the GFS Tape Job so that it would backup the latest backup to disk weekly.
There is no need to define the actual start time for GFS tape job since it has ‘continues’ logic. You define the date when you want a full backup to be written to tape. Tape job starts to look for the restore point during the set day (24 hours) or will await for this restore point to be created.