This is not a comment on the nationals, since I wasn't there and didn't see it, but a general comment on the existing rule. 

What is there for the TT to fix?  The rule here is perfectly clear. Inconsistent enforcement won't change just b/c you rewrite a rule.

The rules says determine the muzzle safe points.
More often than not, the 180 is used.  Pretty simple. If a stage allows, it can be more. If needed, it can be less. Don't see anything confusing about the rule, just follow it.

 Jimmy
A21485