Martin,
Yes is does appear to be correct. The factory-crimp is approved and we can not see into the cooling flue.

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Dale W. Feb, Professional Education For Professional Results
Training: F.I.R.E. Service (805) 552-9958 www.gotoFIRE.com
Inspection/Investigation: F.I.R.E. Associates (805) 552-9954 www.FireAssociates.org