In reply to balmybaldwin:
I took my new wheels out for a play on Sunday. A distinct improvement and I was absolutely flying (blissfully unaware of how strong the wind was behind me). I even got a wagged finger from a policeman with a speed trap, which made my day (it was downhill a bit to be fair). If he'd been a mile up the road he would have had good cause to pull me over.
Then I got to go the other way - uphill, into the gale and the newly arrived torrential rain. It wasn't pretty.