PeteF, looking at the C5 which has an 18-in wheel (110/80-18), it doesn't look like they changed the mudguard concentricity much from when the design had 19-in wheels (the earlier indian bullets looked much like the C5), it is quite gappy until you load weight onto it. Does the 'domestic' 350 not have 17-in wheels? Does it have the same mudguards as on the 500 or are they smaller?
At least one earlier model of the C5 had 18-in fore and aft, the current incumbent has a 19-in up front and revised frame/steering geometry.
Whatever concentricity means, the wheel centre remains the same whether 19-in, 18-in or even 17-in, they remain concentric to the mudguard, just more gappy. I assume you mean the look of the thing, I agree
If we use shorter shocks, we have to ensure it doesn't bottom out too often.