hi all well thanks for you ideas and thoughts.
The car is a company car Not my choice. There is no tow hook i might be abel to get one i would have to see.
changing the scale might work but i know some one makes a 1:100 hull so thats were the scale came from +there a lot of fitting avaible at this scale.
If i did make a box she would be weged in to it tight and that would be well staped or bolted to the roof rack
the weight is not a proplem ford say 90kg max so load of capicty as the batters +ballest would be in the car.
roger love your idea house next to lake mmm heaven but the bank manger say NO

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john