I Post the question in local Subaru here are the responds.
Having never run a Gymkhana, I'm not really equipped to make a call about a good course design. I've always thought those thing we're *way* to complicated to memorize.
Given the space, I'd suggest attempting to design a straightforward Auto-X style course. However, for a crowd used to the challenge of Gymkhana, an Auto-X style course might seem boring, or too fast.
Seriously, it looks complicated to me.
For me, its like drifting. Fun to watch and I always am amazed at the car control of the guys who do it, but I don't really think I'd ever be interested in participating.
Car control at high speeds is more interesting to me then showboating car control.
You know this is true for me too (i.e. drifting/auto-x). I think thats why I like the WRC and other road courses vs. the old (Not to mention boring) oval of the Nascar.
Oh, the one other thing I noticed is that you couldn't reverse the course, and have another car waiting at the start.
(Here we run same course for 2 days. Set up the course run on Satruday then on Sunday run backward. get about 6 run per day and run 2-3 cars on the course at once.)
looks fun but slow if you have a big car
(like Corvette, Firebird, Mustang compare to civic, jazz)