Also use epoxy for landing gear mounts/blocks in addition to the previously mentioned areas. Titebond is great for eveything else. Been using it for 40 years; never had a joint fail. Way cheaper than CA, too.

Fuel proof with epoxy thinned w/ alcohol (use the 90% stuff) takes a bit of stirring to get it all mixed in. Thinning also extends the cure time. Clean brush w/ acetone, and you can use it again if you don't let the epoxy set up.