I tell you what you do then.

Make 3 exact jigs to text the above "theory" and see what happens.

1. Epoxy the first one with 90% epoxy and 10% harderner of an epoxy labaled 1:1 and see how long it takes to cure...if it cures.

2. Epoxy the 2nd one with the same mixture of 90/10.

3. Epoxy the 3rd one with 50/50.

After the first day heat the first example with your heat gun.

After the 3rd day "if" the first two have cured to touch (may/may not still be tacky depending on your climate). Then do what all good people do who want to find out about strength - do a destructive test. Odds are the first 2 will break loose at the epoxy line and the 3rd example will break the wood.

Remember to use a large enough piece of wood with an adequate glue line to put some actual stress on the joint.

Remember your talking about the wing joint of a plane here - not a servo tray.

When your done come back and post the results.

It's the assbackwards example of people who put MORE hardnerer in thinking the epoxy will cure harder/faster/better etc.. it won't.

Also remember that heat is "generated" by the cure - heating is not what causes the cure - but rather a chemical reation between the hardner and the epoxy. If it was the other way around you could simply spread epoxy with no hardner and apply heat from a heat gun to cure -- you can't.

If you want to find out some real "facts" about epoxy and ultimate strengths of glued connections check out the West Epoxy systems website they have some wonderful examples of what happens when you don't mix per instructions...

Will it hold? - Probably .... but why not guarantee it with a good glue joint. Ultimatlely it's up to you to decide if you want to trust YOUR airplane to a faulty epoxy joint

Whatever you decide to do - be VERY careful heating epoxy to speed up the cure (yes heat speeds up the cure but can't replace missing hardner) as adding heat is the number one recommended (by manafactures) way of REMOVING epoxy. So that right there tells you adding heat is not a very good thing to do.