well then I got your fx mod working..
From your readme:
"Radio rod starts rising at 6.5m and is fully deployed at 13m. At 21m the radio rod will start to be undeployed and at ~26m it will be fully undeployed (hidden). As the sub submerges the radio rod will always be slightly visible out of the water until the sub's depth is ~ > 13m"
my radio rod is extending at depth only, when I surface it 'hides' again, which isn't how you describe it above.
edit for pic