BOBS triptych

I was intrigued by this 7X BOBSscript, recalling an 'era' just prior to my own establishment here. I quickly discerned the salient features of its action and constructed a stripped-down base manually, with an extra transform for greater density. This was proper old-school flameage, and I fancied a bridging exercise, bringing just a hint of new variations and techniques to this form originally delineated by the late venerable master Batoruco. And so this is my tribute, three variations on the same framework utilising substitution, pre-linking and variations not available at that time.