(1) A guider bar? This is not a telescope positioned for the astrophotograher; though some will try.
(2) Vixen style dovetail is more then sufficient for this. And this is coming from someone who has standardized on Losmandy.
(3) Would this be the same focuser as on the AT92? If so, its a winner and up to the task.
(4) A case, yes. But not a hard case. I have a lot of telescope cases mostly from ScopeGuard. I am currently transitioning all of them to soft/semi-soft cases from LightWare and PortaBrace etc. These are more practical.
It is nice to have the opportunity to purchase different decent quality scopes and have such a variety to choose from. It wasn't too many years ago that the offerings in (other than the higher end limited production expensive manufacturers) everyday telescopes were not the greatest in optical and mechanical performance. Now we have much improved production line scopes available today.
1. Guider bar / handle - a single point handle is fine for a grab point and carry grip. But a guider mount bar should be a two point connection to be solid enough for imaging. the small difference to make the handle a two point mount handle combination would be a simple improvement.
As to the suitability of using this scope for imaging. Current suggestions for using a 72-92mm short F--# scope is fine for super wide fields and the CA component is better controlled in smaller diameter objectives. But for framing mid sized and smaller subjects 700mm and longer have a large place for imaging many objects. At 102mm even with good ed glass in a doublet the practical lower limit for minimizing CA is about F-7. Even at F-7 a reducer should not be applied because of CA limits - just use a 1.0 flattener. If a desire to go below F-7 then a triplet would be the better choice. Even as objective size gets bigger it soon becomes necessary to go the triplet design route (with some exceptions such as a calcium florite lens). So this puts the 102ED FPL-53/ FCD-100 doublet in a good nitch for a relatively cost effective ota that should perform well in its focal length range. A sweet spot not too big not too smal. While a triplet 102apo would be better the doublet ED will work well at F-7, not so much if reduced to an effective lower F ratio.
2. Agreed the vixen dovetail is certainly good for a 102mm scope.
3. The focuser appears to be similar or the same as those used on a series of Chinese sourced packages. I have a TS-F-11ed that has what appears to be the same unit. It is a very good 2.5 inch focuser - solid and stable. Certainly adequate for an F-7 light cone and imaging cameras not on overly long extensions.
4. Case options can be a separate accessory option, but i like them for safe in house storage and to keep everything together on weekend trips to a dark camping site or travel to a star party.
PM me if you have a larger case you are culling from your herd. I could use one for an F-7, 140mm scope. About a 36-40 inch case 12x12 or so.