Great to hear your back on board Captain Nate!
I have NZ Thunderbike T-bars similar to yours on my '10 R3R and found they tended to push the instruments too close to the tank - so I flipped the instrument to mount topside and found it really easy using most of the original bracket components and they fit neatly inside my OEM flyscreen.
Remove plastic chrome cap (#32 in 2nd image) and make a long flat bracket about 4" long 0.75" wide and just drill 2 holes to match the two under the cap. Using slightly longer bolts with a couple of flat and a spring washer to space out so the bracket clears the indent and faces forward. Drill matching holes to mount the instrument bracket and voila transformed, much easier to read and my David Gill ( toyota6510 on UK eBay ) centrally ball mounted Garmin Zumo that fits the same area no longer obstructs the instrument when riding!
In his eBay item photos below the instruments are in stock position but brackets are visible. My instruments now nestle just under and within the flyscreen itself and sit above the T-bars.
Triumph rocket 3 rocket iii rocket 111 rocket roadster 25 mm ram mount | eBay
14 T2500659 T3 COVER INSTRUMENT MO x1 $32.20 443295 >; MPH Instruments ?KPH Instruments
15 T3010702 T3 FLANGED SLEEVE 6.4 x2 $6.90 443295 >; MPH Instruments ?KPH Instruments
16 T3020050 T3 GROMMET x2 $6.00 443295 >; MPH Instruments ?KPH Instruments