I had an opportunity while up at Mt Pinos several months ago to view through a newly acquired 24 F3.3 Hubble optics ultralight scope. This isn't mine but the owner is a seasoned observer and deploys very nice equipment while observing.
First, the optics were not stock but rather a custom set from Kennedy. Diffraction patterns were identical inside and outside of focus without evidence of under-correction. We were running 2500X on the cat's eye nebula during periods of excellent seeing and transparency with an associated decent level of darkness at a SQM level of 21.53 on two different units.
Second, on the structure, two major bugs were apparent: the DSCs didn't work and the structure "slipped" a bit during certain orientations, similar to a balance issue although that wasn't evidently the issue. Knowing the owner, I'm sure he'll get it corrected with due diligence. Other than that, the scope is a pleasure to view through and if you haven't seen what a large aperture ultrafast newt can do, let me say that it takes the observing experience to a whole new level. It's nothing like viewing through a plethora of standard 25" dobs out there or even 28" models that have a soda straw view with a wide-angle eyepiece. It's in a class all by itself and the field of view with it's associated level of brightness on DSOs is incredible. It's like going from a Huygen's eyepiece to a Nagler. I didn't feel the need to view through a night vision ocular with this scope. It's that good.
PS I've taken a break from the AM for awhile due to work and related issues but it's nice to be back!