Given the cold, dank weather here and the fact that my TT is warm and provides protection to the elements each day when I commute, I have decided to keep it for a while longer. The new engine is running in nicely and there is no other bike that can give me the protection each day to work and back. I still get back ache but can manage that whilst I am saving nearly 30 minutes of travelling time.
I am still angry over the reliability issues surrounding this particular machine, but it is running well at the moment and getting me to work in fine fettle.
I shall look to change it when the weather gets better.