I have no hard numbers for this but for peace of mind you may want to heat gun the scarfs, clean them up and do them over. We all have brain bubbles occasionaly. It's good you caught it early.

   You got lucky, just like William Kneas last week. He did the same on some puzzle joints. If you are going to fiberglass the boat - no worries at all. The glass will add tons of strength. If not, pull at the joint - I bet it is fine. Sometimes epoxy seems less sensitive to mix ratio than folks make it out to be - I am sure I have just generated a lot of comments to the opposite.

Of course, If you don't believe in getting lucky, and think it will haunt you, redo the joint.

   2:1 mix ratio, resin : hardener.

What's the problem? I'm missing something.

ndadam:

The MAS epoxy pumps are set to dispense twice as much resin as hardener. You do 1 pump each to get the 2:1 ratio.

Thanks all for the replies.

So - lacking assurances that 'set is set' and no worries, the consensus is a strong nod to do over and peace of mind. And being of the haunted sort I'm off to Home Depot for a heat gun. A pia but I feel better already -:) Oh - advice on temperature settings I'll need? I have some thinly tapered scarfs I must be super careful with when pulling apart... cheers all.