Why not locate the 'Line' (if that is what people want) well away from
the runway.... about a mile should seperate these two distinct
functions( finishing and landing).

Bob

The finish circle does exactly what you suggest -- finish (at 500
feet) about a mile away from where everyone is landing.

A 50 foot line one mile away from landings might not work so well. You
want people to finish at 50 feet and 70 knots over the freeway or over
the housing development?

John Cochrane