Big block hydraulic roller lifters, which ones or whats your opinion on Comps ?

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Pins that hold the rollers in?

That sounds more like the old Elite solid roller lifters they used to sell.

What did Comp say when they saw the damaged parts?

Im probably using the wrong terminology but the main shaft that the roller rolls on. Looks like a pin? see attached. The part circled in green ( I noticed in my first post I pluralized pin which is probably what made it confusing. Corrected to singular now. Pin. )

They told him to pound sand!

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edit: I may be wrong, looks like it was a slightly earlier version of the lifter you posted. But still comp and still happened…. Not confidence instilling…. See attached pic at the top of this post. Here is a link tot he kit at summit. COMP Cams K33-422-9 COMP Cams Xtreme Energy Retrofit Cam and Lifter Kits | Summit Racing