Hi Johan, yes all good suggestions. The kiln is rated for 40 amps, not 100% sure what it is actually putting out but I think I have it covered by using 2 40 amp SSR's divided among the coils. I agree on the cooling of the SSR's, and have already had once instance where they were stuck open due to being too warm. I used a laser thermometer to check the temp and they were under 90 degrees F but still stuck open. So I added a 12v computer fan to the box and opened up some vents, it has yet to happen again. I have gotten it up to 2000 degrees and held it there for 30 minutes without an issue. I will periodically check my heat shrinks and connectors to verify their integrity.

All great suggestions and comments. Much appreciated.

Brian.