Did they not bother to even read the I'd tag. It clearly says no inserts.
I am not hear to argue and I understand your trying to help but it says do not use an insert that is not specified for this unit. Lopi stated the unit is compatible if you want I can post the email they sent me. I find it unlikely they would tell me it's safe if it was not compatible especially after I voiced my concern about saftey.
My main issue is not if I am going to add an insert it's trying to find out what is causing my drafting issues. Thanks again for the feedback I do appreciate your time.