Thanks for all the comments.
The Tyres are Avons CR6ZZ 245/60/15 & 295/50/15
I'm smiling and looking forward to a long cold winter here in Melbourne and lots of shed time. Below is my build trolley, the base of this design was taken from the AP build manual and I changed a few things to suit my own needs and future projects.
I've used 50x50X5mm box tubing and 125mm Castor wheels. This trolley may not be suitable for other Cobra kits so check and measure first.