Well before the model gets tainted by ,shall I say, 'unsubstantiated' comments about dud locomotives, I think yours is only one of 2 I know about.
Just working the math on this and that's 2 out of 500, so less than half of 1% which in anyone's books ( he says touching wood and crossing fingers) isn't bad.
However this doesn't mean that you cannot be dissapointed ( I was recently having spent £300+ on 2 fleischmann loco's only to have both as duffers!)
If Chris has a spare then great, however if not, I will replace the chassis for you once the next batch of green arrive in a couple of weeks.
Please PM me and let me know if Chris can help, and if not a replacement chassis is your for the asking.
As a relative newbie to model railways after a gap of 20 years I can say I'm more than pleased with the craftmanship of the Class 22 and it has persuaded me that I will invest in more from this manufacturer.
As for 'duds' - perhaps I could add that I have had 4 duds from one manufacturer in the past 2 months - a Hall, Jubilee, Peak & Class 47. Three of the four have been or will be returned. The Hall I can maybe live with.
Possibly just an unlucky streak, but if the Westerns, D600s & D6100s are as good as the 22s then that's where I will be putting my hard earned cash in future!
And a big thumbs up to Dave for customer service as well.