Andrea, how about you gave me your Ha data of a target you choose using your GSO 6" and i will add it to my OIII data? This way we will see how good or bad it can be, or donate your Ha for me and i will donate mine of OIII, what do you think?
I follow your Telescopius posts, very nice, i wasted last 2 years with not ideal filters even for Ha although i already have Astrodon Ha 5nm since 2017, but i use QHY camera which is requiring 36mm filter size so i coudn't have high quality better filters for that, and that is why i ordered ASI1600mm to get back to 1.25" filters as i already added 3nm [OIII/SII] so far.
I will have to store my data online soon or later, when it comes to it I'll be happy to share my raw data with you. Also if you know a way to transfer large files I can prepare a zip/rar for you and contact you back when it's ready. I don't have much in OIII thou done with the 6'' Newton, just three nebulae, the ones you saw on Telescopius.