There is another alternative, a PST conversion. This involves taking the rear section of a PST and installing onto a larger aperture refractor of f/10.
Merlin66 is very knowledgeable about these conversions. I'm contemplating doing one with the PST I have. I also have a suitable donor scope. All I need now is the ERF and adapter to fit the PST box to the donor scope. Already having this great Quark, I just lack a little more of a nudge to complete the conversion...
