Sorry it took me so long to see this comment! DDW isn’t perfect, but it works… usually. Its software hasn’t been updated in a very long time, but it does the job. I use the ASCOM driver in conjunction with the Dome add-on in TheSkyX. Voyager does seem to be gaining popularity but if you have a Paramount TheSkyX makes sense.

Most of my problems with DDW have been with the shutter, but that’s specific to the design of the HomeDome and I don’t think you’d have those issues with an Ash Dome. The belts wear out on the DDW motors and that will probably be the main thing to keep an eye on. If a belt breaks or gets out of its groove it can lead to things seizing up at a bad time. The wheels on the motors also don’t last forever, so I’d recommend having some spare belts and wheels on hand. TI will sell them to you if you ask. If it’s been sitting there unused for years I would definitely check the condition of the belts.

I suspect that the dome quads can get warped in between pre-assembly and when you assemble it, which might lead to them not bolting together easily. I had to go buy some larger bolts in order to get them together in a few spots. I have found that over time the spacers I had to add to get the shutter cables to sit properly on their rollers seem to have become less necessary as the dome has settled. Figuring out the shutter was the hardest part, although it wasn’t too hard. I’m not sure if pre-assembly includes them fully installing and testing the motorized features; I suspect it doesn’t. But if I could figure it out, anyone can.

I do think the third motor is a good investment. Rotation has been rock solid with it, and it’s not something that’s easily added later on if you find you do need it. Since you have the Pro-Dome you shouldn’t need extra rollers though.