I recently purchased a used Evenheat 22.5 kiln. It comes with a NEMA 6-20 plug. I have a NEMA 10-50 outlet in my shop for my welder. Any concerns with making an adapter cable to plug the kiln into the 10-50 outlet? I won't have the security of a 20A breaker but, I'll only be using the kiln occasionally. Thoughts? Thanks!