hello Rob,
Not personally as I was not there.
I have to rely on books and articles in magazines and the internet such as this forum for the information I have.
You may like to take a peek at RAF Victory Claims by John Forman page 202 - quote "On 5th September, von Werra's Bf109, already hard hit by Pilot Officer George Bennions of 41 Squadron, was finally shot down by Stapleton at Marden".
And also "STAPME" by David Ross.
to name but two sources.
Alex