Seeing was absolute rubbish but I wanted to test out a theory. I made a 60% aperture mask for the 11" SCT which works out to approx. a 5" aperture less the fairly big central obstruction.
Even though the seeing was sub par; 2-3/10 tops (I only saw a very brief 2 second period with seeing of about 8/10) I'm now starting to see granulation & surface details. Can't wait for nice seeing to test this out further.
Sounds like your adding another string to the bow there Asi.
Asi, years ago I experimented with a whole plethora of masks and one that produced interesting results was off axis.
Might be interesting to try a mask with the largest off axis hole you can cut that uses a section of your primary from its outer edge to the edge of your secondary to give you a totally unobstructed light path. You probably have already tried this but if not.....
