Bob.
No increase in vibration. This car has a very slight shimmy which phases in and out. I suspect it's wheel balance but is so slight I can live with it.
The tyres just touch the bottom two inches of the reaction bars on full lock. I've squeezed the bottom of the bars oval and gained 2mm but i would rather they didn't so I'll be taking them off again shortly for further work. I've also raised tbe reaction bars by 3mm and all that has almost provided clearance.
It's said that Morgans have a concession for the MOT in this respect and if so it must be relating to the age of the chassis design which predates MOT regs. Keith at BHM is absolute about that.
I have 185/70's on 4/4 wheels, which have the greatest inset of all the wires so least clearance to the crosshead and reaction bars. My Roadster wheels don't come close to the chassis or reaction bars. There's a finger width gap.
I do have a fall back position in that I have a set of rollers in stock and if necessary I'll fit them!
