Isle of Wight Studio Glass is absolutely relevant.
It proves, beyind any question of doubt, that Michael Harris was making this design of colourway in '73. That is real physical evidence.
Just because he did not make loads of it before he left does not mean it is not his design. He wasn't there for long.
I will stick with physical evidence rather than ancient hearsay.
Boffo chose to execute it in the grid formation, it's attractive and well done, but easier than random to make look good.
What confuses me about what is being said here is that it was previously reported that it was only Boffo who made the art glass pieces at MDG - this suggests there were other workers also making art glass bits.
Certainly, from the pieces I have that makes more sense.
I suspect he would have been working with somebody, training them whilst doing so. It would explain the lumpy thick flanges.