I know that the gliders like to soar on west lomond but you weren't over there doing spins and it really is anyones airspace.
First, they don't soar much on West Lomond, they soar the Bishop.
Where we were doing spins Portmoak was at a down angle of 30 degrees from 5000ft. Yes we were "outside" the area, yes it is anybody's airspace, I still think it's a bloody silly place to be. Perhaps because I have spun gliders in the same place.
I have been strapped in to a glider at Portmoak & seen 152/172's passing blissfully overhead at 1000ft. I've seen traffic close by & wondered where they are going next. A heli once came over the field at 50ft landed at the launch point without so much as a,by your leave, & asked the way to Aboyne, not a chart to his name, we gave him a chart, showed him where to go, Moron.
It doesn't take much common savvy to avoid places like that, the graveyards are full of people who had the right of way.
The advice I had was. Class G is Injun territory, keep yr powder dry & watch yr back. There's no point going looking for trouble.