> . . . I've checked the missalignement and I've got aprox a whole inch offset!.
> From bow to stern really looks like a banana...

Only an inch over the entire length? That's not too bad. Shift your weight a 1/2 inch to one side or the other (position your seat carefully) and you'll probably never notice the difference. You can also add a rudder, or a skeg to compensate.

> I assume that one of my greatest mistakes was to build both deck and hull
> with nine feet strips w/ weak edge joints, PLUS a home made strongback
> built of a plywood sandwich (I couldn't find dried solid wood, so I made
> up this solution). That allowed a lot of wood movement, and now I am
> paying the consecuences.

I'd look at the strongback as the source of the problems, more than at the 9 foot lengths of wood. It is hard to think of a 9 foot long joint as being weak, even if it is only 1/4 inch wide. If those joints were truly weak you oculd just reposition the forms and the boat would settle into a new shape.

> On the other hand, a couple of yards away, the boat looks great.

So paddle faster and don't let anyone get close enough to notice.

> People will notice of this banana error only by the over development of my
> right arm (trying to correct the course of the boat by paddling...).

Nah. After the first couple days of arm cramps you'll rush to install a rudder. Besides, 90% of men have an overly developed right arm. It comes from doing excessive elbow bending in businesses that offer liquid refreshment. (The other 10% are left-handed drinkers.)

> I've learned an important lesson: Don't ever try to re-invent the wheel!!

Don't give up too easily. If it wasn't for all the efforts to reinvent the wheel, most engineers would be out of work. There are already thousands of different wheels on the market, and many more that aren't. (Try to find wheels for a 1929 car. They don't make 'em like they used to!) It just goes to show that there are many solutions for any given problem.

In your case there is probably a solution, too. It would sure help to SEE the problem, though. The cure might be a simple brace, an internal frame, or maybe re-installing a single strip. Of course, a cure might require more drastic measures.

Stretch a string along the keel, from bow to stern and it will show if or where the centerline goes to one side. Get some pictures of this, including a closeup of the center of the boat, showing the deviation of the keel from the string. If you can post them, great. If not, bring them to Chicago, and if I get a chance to meet you I'll be happy to take a look at them.

Paul G. Jacobson