Building a 1:8 offroad track and I need advice

[chipo]

Helo everyone.

We are building a new local track for 1:8 buggys in Slovenia (Europe). It's almost done, only jumps are missing. I'm asking you to look at attached track plan and tell me what do you thing. If the jumps are positioned wright, if they are to big (small), some other proposals ...

Some pics of unfinished track:





Attached track plan:

http://file.si/file/174DRVA_julij_09.pdf (enter code (koda) and click save file (Prenesi datoteka!))

I worry about the space befor first jump and after second jump on back-straight. Should it be more space for takeoff or for landing? I don't know if 6 m for takeoff and 4 m for breaking into curve will be enough? Maybe 5 m / 5 m? Can someone give me a good advice about positioning jumps, where on straights?

Attached pictures of full track and back-straight plan:



Thanks for helping.

Best regards,

Chipo