UPDATE....
So, the bolts did indeed turn to powder as soon as I waved a spanner at them. Quick trip to my local mech and they're sorted.
In the meantime, I've fit the new fairing and screen (yet to be painted) and fit a reverse cone silencer (sounds soooo good), bar-end mirrors, ditched the grab-handle, rear fender/indicator assembly, new under-tray and added some new bullet indicators.
Next step is having the fairing painted, fit (and then paint) the seat hump when it arrives and then start on the frame, wheels, swingarm and forks, paint the fairing bracket... lots to do!
Here's how she's looking currently...