Is Hinode a proven solution for TOTAL solar eclipses? I was thinking about the Sky-Watcher Solar Quest but some users have said it does not track if the Sun/Moon are totally obscured....which makes it pointless for the period of totality. I don't want to use an equatorial mount and have to fiddle with alignment, etc, hence my question about a simple Alt-Az mount. There should not be much field rotation in the 4 minutes + of totality to impact a large enough FoV. Any suggestions?
SolarQuest will keep tracking and stay the course for quite some time, despite no sun during totality. Make sure it is level and the mount will perform admirably. Since it will self align while it is "seeing" the sun, it will keep doing alt / az corrections at solar tracking rate when it is not seeing the sun.
Hinode guider will not work between C2 and C3. Your mount will track then, but the difference to SolarQuest, is that now all depends on how well your mount is polar aligned (as opposed to SolarQuest which will auto-align itself beforehand, hence track very well). Therefore, if you don't do a halfway decent job to polar align, you will have some drift. There are many methods to polar align during daytime, one of which for example is here.
Which scope do you plan to use? I assume either your Stowaway or Coronado, both of which will ride on the SolarQuest. The only recommendation I will make re SolarQuest mount is to get a slightly beefier tripod to use. It is a great little mount and I use it for WL imaging of the Sun. My setup as shown.