[g.l.amour]

all the blocks seem to have too much free height over the die area. if u could reduce that then my guess would be that the first would be the better performer.

the second i don't think will do too well although it looks really nice. (not enough velocity over die area).

the third might get good, but the rotating arms are pointless. better straighten those out and put the barbs stricly west and east of the inlet. that reduces flow resistance outside the die area a little, which is always good.

these comments are for tecless blocks, which without a doubt the first and the third are, the second one might be better for dual usage or tec only.

this is my humble opinion, there will others here who will be better at precising the eventual flaws.