ORIGINAL: B.L.E.
If it was glued with epoxy, you can use a heat gun to heat the joint. At around 400~450 degrees, epoxy turns into goo and lets go. I have removed a "oops" firewall glued in with epoxy that way. Patience, it takes awhile to get the joint hot.
there is no way to get the full 8 " or so of the jointer hot enough to be able to pull it out. Your balsa will scorch and may go up in flames. The glue joints around the jointer are going to be destroyed in the process. It just flat will not work.
THe heat though is a good way to get the fiberglass tape off the joint. You don't need the 400+ degrees, at 250 epoxy and CA starts to break down. At 350, Epoxy starts emitting hazaderous fumes. You want to get it just hot enough for it to start into a plastic state so you can scrape and pull off the bond. Actually boilling water is hot enough, but it doesn't do the balsa any good.
I had to remove a lot of epoxy slop from the wing I salvaged. I used my covering iron on a lot of it, but you can only head up one or two square inches at a time and still be able to work the softened epoxy. As you move on, it hardens right behind the iron, so heat and work fast.
Don