O.K. the job is jobbed.
Putting it on the correct (TRD badge backwards) way around helps
With one spacer each side, and the "tweak it down over a piece of wood" trick, achieves a knockless fit.
Problem is, the bonnet was still hard on it, it would close, but had to bend to do so.
Decided to work some off the manifold to achieve a spacerless fit.
Maxed the groove to achieved a knockless fit, but only just.
It was touching the front of throttle body, so took some off there too.
Again, the bonnet still touches, but only gently now.
I think the only way to achieve total clearance with either an N/A or TT, would be to remove the fibreglass lining, or maybe fit a TRD bonnet?
Or 'donk it' in the middle with a club hammer.
I didn't want to do either, so piped the edge of the modified snorkel with small bore rubber pipe.
Sooner have metal to rubber, than metal to metal contact.
The car seems happy with this brace to bonnet light contact, no rattles or buzzes.
Haven't been for a B road blast yet, but on my way to Tesco's, it was noticably less twitchy over single potholes.