A lot depends on what happens after that negative experience by the user/reviewer.
I was talking with Brett about the Bloomer deal.
My .02 was that I would have taken those very heads that came off the underachiever, and put them on a 408/416 and seen what I got out of them.
There is one similarity between the Bloomer heads and the TF SB heads........ neither of the two had been tried on a motor by the manufacturer prior to being released for sale.
Unfortunately, his window of opportunity has closed somewhat with the release of the TF’s as complete heads for similar pricing as the Bloomer heads bare.