Cheers OT, my sentiments exactly!

By the way, my bus modification was based on the fact that the AECs ran perfectly well in sunny Portugal - at the time one of their major export markets. The difference with the export version was simply that the same basic rad was employed, but with deeper matrix. Voila - problem solved .... !

Back to reality - yep you're right, cost-v-practicality-v-hassle etc etc. Cheers mate!