I currently have an Esprit 100mm. I've been imaging with it for a few years and have the ZWO 8 position FW, ZWO OAG, and ZWO ASI1600mm Pro cooled. I just received my new Esprit 150mm APO. I have installed a Moon Lite focuser on the 150 as I did with the 100. I was checking when ordering the focuser about if I'd need a different adaptor for the 150's field flatner or other spacers. I learned that the 150 field flatner and my 100 are the same size so my adaptor ring from the focuser to the field flatner will work. Perhaps the gentleman was referring to just the one adaptor but I got the feeling that he meant I'd be good to go.
I know that the Esprit 100 had a back focus to the sensor of 63 mm if my memory serves me right. I saw in the Esprit 150 it is 100mm? I wouldn't think my current spacing would work.
Anyone with a 150mm using same or close to same image train as I described above and what space(s) and their sourcing? IF this has already been presented, I'm sorry, point me to the appropriate thread, please. I did a search but didn't find what I believe I was looking for.