half a litre potentially too big though.....
Ideal size is said to be capacity x 1.4 I believe, those uni ones from oop norf are over 2x 1.8.
I also want to make one using one of those plenums, but they look like there's scope to cut at least 2-3'' off the fat end of the plenum, which should bring it's volume back inline with the SEM and similar. Would also allow you to tweak it to get the TB angle just right
Looking forward to seeing this beasty in the new year.
Is Ace Cafe too far for you now dude?