I will probably put an E07 on for the summer. I haven't tried them yet. I have kept to the off-roady end of the spectrum because I like to retain that capacity.
Gravel is a funny thing, because conditions vary so much. The last couple of rides have taken a while for me to get dialled in. That's partially because of (impaired confidence from) the period not riding, & also because the MT21 front has lost its edges. But when I've done more technical riding it can be a breeze..
I'm expecting the CtC to be mostly gravel.
Didn't get the AF sensor & gauge, though I still may still do so at some stage. My issues were resolved with trial & error. Basically draw up a spreadsheet & make one change at a time. Jot down the results. Rinse & repeat. Mileage is still not that great, so some more work is required when I can be bothered.
No, wasn't me with the Harmoniser. I've got Morgan mercury gauges from the early 90's.
Volty's box is a complete replacement ignition with a laptop interface
My '91 R100GS thread is here
My Ride photos are here
It's just better when there's twins involved....