@michaelmorris We don't have one here and won't until the next shipment arrives in April but...
1. The dew shield isn't threaded for filters, the ridges are baffles. A filter would need to go on the eyepiece.
2. Didn't think to measure dew shield diameters but will when stock arrives, hopefully an owner will post details before then.
3. Sky-Watcher's own illuminated reticule eyepiece is a 12.5mm Plossl with 40° AFOV. Baader also offer their 12.5mm Microguide eyepiece, an Abbe Orthoscopic with 42° FOV and a more detailed reticule but it is considerably more expensive.
4. The regular 9x50 Sky-Watcher finderscope bracket won't fit the new EvoGuide.
HTH,
Steve