Thanks Ken but with the ADM, I do not see any screws, etc. It looks like it is the dovetail only
The Astronomics bar is just an adapter bar. Then I would need a dovetail it appears.
As Ken explained, the bar is a dovetail. It has those two pieces that stick out on either end, those prevent it from sliding in dovetail clamp.
That said, I would get something with a longer f-ratio for the planets or at the very least a binoviewer so that the impact of floaters is reduced at small exit pupils.
A slower Focal ratio 4 inch would not help with floaters. The exit pupil diameter depends on only the aperture and magnification so at the same magnification, any 4 inch provides the same exit pupil..
I've owned my NP-101 for ten years, it's a wonderful scope, it's everything described so far.
The machining and mechanical design is exquisite. As a mechanical engineer, I look at how a scope is designed and made. Most good scopes, they're designed the way I would design them, straightforward with an eye towards quality but also with an eye towards avoiding complicated machining processes.
TeleVue seems to take it to another level. A simple example: the one piece sliding dewshield. Its just an elegant piece of work, not flashy, it doesn't catch your eye but it's angles and soft curves, that's not an quick piece to turn out. The Everbrite diagonal, the body is one piece, no eyepiece holder to thread in place, no nose piece that threads on, it's all made from a single piece of aluminum, that's just some fancy design and machining. It a piece I can look at and just admire for the workmanship.
TeleVue scopes aren't flashy, they're understated, they just work, optically and mechanically.
Something to consider:
The NP-101 is very fast for a refractor, F/5.4, and it's fully corrected for the various aberrations, it can provide sharp-sharp views across the entire field of view at any magnification. But, it's not forgiving when it comes to eyepieces, because it's as good as it is, as fast as it is, it brings out small aberrations that might go unnoticed in slower scopes, that might get lost in the jumble of aberrations in another scope.
The NP-101 and a set of TeleVue eyepiece, they're made for each other.