Gary,
An interesting and challenging project. I'm sure, with your customary determination, you will succeed; but here's a question. Imagine the scene:
It is a wet and cold night. The rain has been coming down steadily all evening. A dithering O.A.P., just like me, approaches a Zebra Crossing intent on reaching the Fish & Chip shop on the other side of the road. Meanwhile a young, lithe driver in a 2 Litre Saloon, just like you, has been driving across town, adhering strictly to the speed limits. As the 2 Litre approaches the Zebra Crossing the O.A.P steps out, concerned only that the Chipper might be closed. Now the question - would the O.A.P sooner the approaching A.C. had drum or disc brakes fitted ?
Barrie