Thanks! High praise from the current king of beautiful conversion work!
The SSR heatsinks really worked well in addition to looking nice. The SSR went from too-hot-to-touch to just over room temperature. The heatsink is just barely warm to the touch after 45 minutes of spindle run time. This should help the SSR's last a good long time as I also went with ~3X maximum running current on the SSR's rating (16A vs 45A). I added some thermal paste under them for maximum heat transfer.
It's starting to feel like I may actually get this done. The pan is going to be hard to get done reasonably. I'm worried the cost may come in at a prohibitive level, but I really want the metal pan. The first local place that I hit up for it said they would have to spend a lot of time welding as they couldn't make it with those bends and referred me to another place with more elaborate machines.
It's looking like my lack of welding skill, tools, or inclination may cost me as much as the machine did. I'm betting that an 80/20 enclosure and this pan will cost north of $2,000 before it's all said and done. The enclosure may be a 'next-year' outlay. I can always just erect the basic frame and do the heavy shower-curtain thing until funds recover. This will mean giving up the Z axis linear rails I was hoping for. That will probably have to be a project for after we get our cabin construction finished which has most of my play money tied up to a stake.
It really is getting exciting though to see some physical things taking shape.