Been following this with interest, not likely I will join in as I am only home 2 days a week as it is without disappearing into the shed

Anyway, have my 2c to add, how about these for rules?
1. Base car must be a 1200 or a thou. They are the point of this site aren't they
2. no limit on what the car costs to purchase - reason is that a lot of people won't have the room or $$ to get another car specifically for this challenge and so can use their existing datto
3. the $1300 limit comes in towards anything that isn't standard (and by standard I mean as it was delivered from the factory! Not how you bought it standard with a CA!).
4. suspension and brakes can be upgraded with other "bolt on" datto units for "free". More a safety issue than anything.
Have at it and see what can be run with it! Bring on the 13's!