Is this safe? Should I start again?

I’ve been posting in this sub too much the past days sorry. I have a question as to whether I should start this furnace build again. I have been following the updated tkor build and have recently discovered there is lots of negative reports about it.

The steel bucket is lined with kaowool, fire bricks and fire cement. Is this safe to use or should I start again with an empty propane tank or keg and diffefrent method?

Will be using devil forge burner.

Thanks