I had a LX85 Mak and was not that great. They all very as well.
I think most ‘production’ scopes vary to some degree, which is why I believe AT and TE have offered, at a reasonable upcharge, a ‘upgraded’ version of their production models where the manufacturer (KUO I believe, at least for AT) checks the individual scope to ensure it meets specific optical and mechanical criteria and then sells it as the EDL variation. That way unless you are buying a premium product such as AP or TEC etc it’s a crapshoot as to how well what you get performs.
An example Chas is your sainted 826. Yours and most others out there are really good. The first one I got back in the day was terrible and went back while the replacement sent was okay but nothing that blew my socks off.
there are fewer duds out there today than when during the era when the 826 was born, the use of computers providing for more consistency in optics as it has elsewhere. Did I get lucky with my LX65 Mak? Probably and to be honest I had some concern when I decided to buy it but the price was very right. Collimation tools and star testing was a pleasant surprise so the roll of the dice here proved successful.