Hmmm. Sounds really familiar. Only in my case 1972 instead of 1968.Been using them for yrs. My 1st homemade "pad" was a 6" piece of 2x6 with a welding rod stuck in it. Used the lid from a 3# coffee can for a blast plate. 1968. Damn........ I'm OLD........
We’re not old, the word is ‘vintage’.