Myself, I don't think many manufacturer's would share their "secret tricks"... kinda like a NASCAR team sharing their secrets.
But I have applied many of Criterion's recommendations , and IMHO they do help.
This is 10rds, at 100yds, scoped, benched, bagged.. etc> PSA upper and lower, Criterion 22" 6.5CM , Hornady AG 140gr... various Criterion "Tricks" applied during assm., Yes , I blew the flier.
Attachment 110868
This group, is also same as above, but 308 18" Criterion barrel, 155gr Horn AG , same everything else.
Note I blew this flier as well...
Attachment 110869
IMHO, I would build / assemble one, if I can do it, anyone can.