My TCTs have many more mods, aside from a bigger hole.

If all they had was a bigger hole, then I would be copying s2ooonvegas.

 

Btw.. looking in the Honda EPC (version 17.00, released 08-2010, available online for those who know where to look) I found that you still get the old style retainers & keepers for MY'00 engines and the updated ones for post MY'04 engines.
All F20C2's, the EPC is a European one (I think)
So Honda never back-spec'd them.
Most likely didn't bother to update the parts catalogue.
Oh well...

So you only sell them to people after they sign a NDA?

 

I dont know what an NDA is, and no one signs anything.

 

NDA = Non (+o = Nono ) Disclosure Agreement.

In science its pretty common.
Making claims without posting (publishing) about the how & why is .. oh well..


About the retainers:
I never did see the markings on the cotters or the retainers.
The retainer in the picture however does look pretty much like "our" AP2 retainers.