Yesterday fired him up, up he went happily on the (tired) airbags and off we went. 30ish miles of mixed driving, smooth ride and good to have him rolling again. Didn't take him too fast as knew one back tyre was down about 8psi. Lovely to have the V8 grumble again, but seems to have gt a slight sluggish sensation up to about 20-25 mph and an occasional 'spoing' noise then too, more after braking to a standstill first. Brakes felt a little soft on th epedal, but no fluid level issues or warnings. Tried spraying some water on the discs and callipers when we got back - on bikes that has been a good guide to a sticking / dragging calliper but no steam or hiss here.
Tomorrow hoping to take him for a bimble off to the petrolheads Sunday meet at Ye Olde No 3 Lymm if Wife agrees. See how he behaves on that, with the tyres fully pumped. Also planning to pul the EAS delay relay and see if that helps him pump up quicker when we fire up. Got a feeling the levelling is deflating everything more than necessary.