Tom, that's correct. If you also blocked the front engine area, this would give much greater support to the assembly. The bottom of the fuse should be flush with the work surface. Be careful to shim the front appropriately, IF needed, to bring the tail post exactly perpendicular to your work surface. Brian's new fuse needed 1/32" shim on one side. That's minor misalignment considering how large the fuse is.

I have now received more emails from guys with failed tails. Not all fuses are affected of course. Its a small percentage. This is an otherwise fine product.

To CARF, Andreas, if you are listening, it would be so much easier to add a couple bulkheads in the tail when the fuses are being cast. These do not have to be elaborate. They simply need to support the fuse all the way around. The simplest is Carbon tow, around 12K, under the secondary internal glass layer, will provide plenty of support. One at the tail area, one mid-way and one at the wing trailing edge. (At least offer templates in your instructions so we can add balsa/glass formers.) The weight pick up would be less than an ounce. The idea is to reduce the span between supports, to greatly increase the natural harmonic frequency of the structure and take better advantage of the stiffness of the TAVS used. It will not be as easy a structure to buckle

To get an idea of what Im talking about fellas, take a couple sheets of paper and roll them up into tubes, overlap and tape the ends. Stand the first up and place some weights on it until it crushes. In the second tube, add two formers inside separated by equal distance, and do the crush experiment again. How much weight did it take ito crush the second?

MattK