CA (Krazy Glue, Super Glue, Zap, etc.) are effective in assembling models, whether the parts be made from plastic, resin, or metal. However, CA is a tool. Like all tools you need to learn how to use them correctly and efficiently. In your case with the prop and CA, I can't tell you what you did wrong. Perhaps too much glue, perhaps too little glue, perhaps a dirty, ill-fitting joint, perhaps it moved before the CA set, perhaps the CA set before the parts were joined, perhaps it was old or poor quality CA. CA has worked for me making similar repairs. It is technique, Technique can be explained, but it must also be practiced and perfected. Perhaps before you invest in the Gato kit and a similar amount in the Nautilus aftermarket resin conning tower you should invest in a learning kit or two. Get the Gato & build it out of the box, but use CA instead of solvent glue. Next get an inexpensive resin kit and build it. This one, for example, costs less than the Nautilus conning tower |