: I'm not really well versed in epoxy usage, but in my experience you will
: likely need to thicken the epoxy somewhat to keep it from migrating out of
: the joint before it sets up. I mainly use T-88 (already pretty thick for
: epoxy) for various types of glue joints, and usually could do a better job
: if it was even more viscous.

: Concrete blocks and some method of distributing the weight will probably work
: fine, but you just don't want to over-clamp and squeeze too much epoxy
: out.

Screw or use cable ties to tighten the stringer to the notch in the cross
section with thickened epoxy in and around the joint. The thickened epoxy
should have a peanut butter consistency. It will run very little or not
at all. If it runs a bit, wipe off any excess before it cures.

See Link below with text at the bottom of each page.

Tom