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These big scopes are certainly rewarding with the views they give and a 20” that can still be portable is excellent way to go.
I went from an 18”F5.6 to my current 18”F3.5 “ Excalibur “ DIY job as I needed a more compact scope to fit into my motorhome through a hatch. In the process I brought the focuser down almost a metre and saved a lot of weight. Sit down viewing even at zenith is a nice bonus and it fits in the back of my Subaru XV Hatchback. Though as I’m getting closer to 70 I’m now considering building a baby version of Excalibur using my 13”f4.3 mirror set….
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