Hi Bill, thank you very much indeed. I didn’t expect to meet you on the forum. Your book is thoroughly engaging, thank you for it. If I am observing with a refactor and star-diagonal (currently a Borg ED-76, which shows plenty on the moon with a very clear image), I assume that I need the SCT-with-diagonal version, specifically this one?
https://smile.amazon.co.uk/dp/1931559295/ref=cm_sw_em_r_mt_dp_U_ImlaDb6BM30W9