Hi Allan,
Have had one on my T100 for ... oooh ... fifteen(?) years. Can't post a photo. as I'm a mere pleb member but my T100 looks pretty-much like the TR image.

- Looks the dog's dangly bits (I was torn between mounting on the bike or on the wall as a piece of modern art). Mine bolted straight on, no issues - extended stainless nuts screwed straight into the disc-brake stanchion top caps. Cutaway between the clocks allows access to the standard
Lucas lighting switch lever.

- Pressure gauge is too small to have its own illumination. "TR7RVMan" Don had trouble fitting his to his bike - apart from Meriden was a bit carefree about exactly where they glued the headlamp bracket lugs to the shrouds, so headlamp vertical positions vary, OIF have 1/4" less vertical distance between the yokes.
Another bike needing one, would I buy it again? Do bears crap in the woods? Apart from anything else, Don might sell me his cheap.

Hth?
Regards,