Yesterday was round 4 of LFSCAR and for that round we used a custom (oval) layout. The event was intended to be 123 laps but once you reach 99 laps, the game only allows you to adjust in increments of 10. Needless to say the admins of the series had to make a change because of this bug.
With that being said, you couldn't do a "true" distance based enduro. If you wanted to do 200 miles on a 1.57 miles course, you would have to do 127.38 laps, which rounds to 127, not 130. Imagine that on a 3 to 4 mile circuit... I'm sure some of the admins from MoE (they discussed running a 1000KM event last season) might be slightly concerned with this, as I know a lot of the ovalers are.
With that being said, you couldn't do a "true" distance based enduro. If you wanted to do 200 miles on a 1.57 miles course, you would have to do 127.38 laps, which rounds to 127, not 130. Imagine that on a 3 to 4 mile circuit... I'm sure some of the admins from MoE (they discussed running a 1000KM event last season) might be slightly concerned with this, as I know a lot of the ovalers are.