Why take the chance?
Morning,
for the record I'm a 66 owner/pilot, and will without doubt find myself out of years before I'm out of hours. However, I'd not take the chance. For me, the OEM defines (and has approved) the TBO schedules and its done for a reason.
I recently attended the RHC Safety Course with Tim Tucker and found it really informative. He did spend some time explaining how some of the operating limitations were arrived at - there is a lot of science to it, and there were a number of factors that I would not necessarily have thought to be involved.
Its your life up there, so I guess it would be your call, but I wouldn't fly outside the manufacturer's TBO any more than I'd fly unapproved manoeuvres.
BTW I thoroughly recommend the RHC Safety Course!
FF