Sorry if I came out as personal. Where did I try to judge you, why do you feel so? Maybe I was too direct in the question, and perhaps I used the word 'claim' too strongly. Sorry about that again. Nothing personal.
Questioning is not allowed in this forum? Are we supposed to check how many posts someone has made, how old they are, and what their name is, before asking a fair question or objective data?
Of course questioning is allowed. I'll try not to be so sensitive moving forward. I wasn't attempting to prove or disprove anything with my statements or links. I posted the first unguided single sub I could find. I didn't measure FWHM prior to posting. I looked at it, it looked decent, I linked it.
I do take issue when folks without practical experience question those sharing and attempting to assist with their experience. However, I can be a cement head, and as Alph can tell you I've had plenty to say about TDM gear and have not own any.
Sorry for the distraction. I will look further for data, but as stated by others, I think plenty exists out there. That said, good solid work can and has been done on mid to low end gear as well. Ones understanding of their gear and diligence can result in great things regardless of the pedigree.