,,. Soak the SPG and boot in hot water before removing it...
Good tip. Adding a little liquid soap to the warm water for lubricant also does wonders.
I've never crushed the plastic ones and I use them on my side mount. They sit pretty exposed out in front.
I agree that metal SPGs usually dont need a boot, but a lot of the plastic ones probably do. It is less an issue once you are in the water, but getting in and out plus ending up in the bottom of the pile aboard an inflatable is another matter.