Floppyjock, the end of your last post could ne interpreted as unpleasant, but I will assume it was Tongue in cheek , I can tell you that I have the same airspace issues when flying a single display at off airfield sites, in spite of full Caa permission and 500 foot rule exemptions and notam action the display only has permission, not protection. I work really hard not only trying to display well and in the correct place but also look out and listen to local RT at 200+ mph and +5-2G, my biggest worry is someone bumbling through my display despite smoke and permissions, you seem to take great care before dropping the meat but please don't assume your DZ gives you any protection, stay vigilant.
Enjoy the sky.