I see that the GSO 16" f/8 RC is now available:
http://www.andrewscom.com.au/site-co...-guansheng.htm
https://www.astronomics.com/16-f8-tr...be_p20090.aspx
Too much money for me to jump first, but will watch developments keenly to see:
- how effectively it can be focal reduced
- quality of the optics
Roger.