I discovered this bug this week. In fact, you can load any layout you want to hotlap mode via the command /axload=name.
So, for example, if you place some barriers to the front straight nicely, you can actually gain more speed because of the barrier bug and therefore make a better laptime.

I tried to upload a hotlap with it and it accepts it without problems. It should be fixed

Quote from Flame CZE :

So, for example, if you place some barriers to the front straight nicely, you can actually gain more speed because of the barrier bug and therefore make a better laptime.

I'm not sure, but it seems to me that anti-cheat system on LFSW analyze telemetry in replays (for example acceleration and max speed of car), so this is rather impossible.

However, you can easily mark braking points using chalk lines and/or cones just as show racing line or better.

Definitely this bug should be fixed before removing all world records from LFSW.

Quote from adamshl :

I'm not sure, but it seems to me that anti-cheat system on LFSW analyze telemetry in replays (for example acceleration and max speed of car), so this is rather impossible.

I tried to upload a hotlap with some barriers placed just in front of the S/F line, where I went throught it with my car (and made a slightly better time) and everything was completely valid.

Of course I deleted the hotlap then.