For some reason this forum would not allow me to reply to my thread about making holes through a FC hull to install a couple of transducers, so I am asking my follow up questions here. Thanks so much for your replies.
The Epoxy Mortar sounds really interesting. Is there any brand that is better than the others? I googled a sikaflex product this arvo.
Diamond hole saws I am familiar with but these plunger type boring machines are new to me. I'm imagining something that looks similar to a drill press. Can anyone point me to a link for one of these things so I can try and track one down. Is it practical to use one under a hull? I imagined drilling a small pilot hole from inside the hull but making the large hole from the outside in.
And just in the vain hope of saving myself a heap of work (and probably pain) I don't suppose the glue inside type transducers will work through a ferro hull will they? The steel would bugger up the signal I'm guessing.