Dave,

This wasn't all about being obsessed with throttle response, it was about the disappointment of dropping thousands on 5 of these and finding out they performed worse than the model they were replacing. Whilst I thank you for helping sort the issue despite not purchasing them from you I think it's a bit off to make it sound like we were the ones in the wrong.
If you still feel the same then please try and think of another product you have sold where the replacement or new version performed worse than the prior model and you thought it acceptable.