Not sure mate but if you think it might touratech do
a ball joint bracket that fits on the lower part of the handle bars
which gives you more adjustment and brings the gps unit
higher up.
If you have a RAM mount set up eg, RAM-B-149Z, shim adaptor RAP-319 and then 60C cradle, then to get above the bag, try a RAM-B-230 ball adaptor and another arm RAM-B-201 or RAM-B-201-A.