In the process of replacing the bilge pump on my 23.5, I discovered that the wires running from the electrical panel to the pump seemed a bit rotted. When I went to replace them, I found that I could not pull them out. They seem to be embedded in the foam between the inner and outer hull where they run up into the panel. Anyone try replacing old wire in their 23.5? Is there some trick to getting the old wires out? I'm afraid of pulling too much and breaking the wire up inside where I can't get to it.