Rail spacing

[jsarkozy]

I am planning to lay some track using the "groovy" track method.
My questions is this; for 7 1/2" gauge track...what would the actual spacing be on strait sections? and one curved sections?
I am thinking of making it 7 5/8" all around. Would this be acceptable?
Thanks.

[wirestrecher]

I would aviod groovy track. rail is crowned for a reason, to maintain maximum contact area with the wheel. with groovy You lose that , will have traction problems and its hard on the wheels