Hand riveters do wear you out quickly. I know you have ordered another pneumatic one but self tapping screws are also an option, quick and easy with a cordless drill.

You were fortunate not to be injured by that failure. The cast iron obviously broke apart but even 120 psi shouldn't have caused that. I'm guessing it was dropped at some point. HF junk is obviously not the best quality.

I've seen larger floorless ovens built with split doors(split vertically) but don't recall any smaller ones. That seems like a fair amount of work. A small door/window for getting a temperature reading can be either hinged or just a pull out.

You've posted two similar questions, but to address the peeling issue you mention, IMO that is greatly over stated. I've heated my galvanized sheet constructed oven to around 500 for out gassing purposes and the galvanize has not "peeled" or exhibited any other signs of failure.

Most every oven I've seen or read about has used galvanized sheet for construction so I'm not sure where your concerns are about heating to 400 degrees. I've had my oven constructed of galvanized sheet for many years and the zinc galvanize has held up fine and the only fumes I occasionally smell are...

If you have the patience and a decent IR gun to monitor temperatures then sure, you can manually monitor the curing of parts. What the pid and relay combination achieve is automating the process, but not entirely. Regardless of the process you chose, you need to monitor the part temperature and star...

The question about the actual size is significant. If you're referring to od then this size oven would be about 90cf inside versus about 130cf if you're computing inside dimensions, quite a difference. Regardless, imo this is about the largest practical size that can be built and heated with a singl...

I'm not familiar with the inkbirds or any of the other cheap pids on the market, but why do you have two pid controllers? Aren't the itc-100 and itc-106rh both pid controllers. The more professional pid's usually have an over temp alarm capability if that is your concern. I'm not sure I've ever seen...

This site gets little attention any longer. You might get better results posting your question here:

https://www.facebook.com/groups/783347478386235

I've had good success with all Omron products but there are probably many other high quality component manufacturers. Another option if you cannot get good results is to incorporate a cooling fan onto the heatsink or purchase one in this configuration. Years ago I documented a control box build that...