Really dont fancy that! May try it when the weather gets better. What specialist tools are required? Thought I would have been able to just dig out all the sealant on the inside, have the missus ready to catch (I can that going horribly wrong!!) and pushing it out. Fitting would be the reverse as the saying goes! Obviously suction pads (or whatever they're called) to hold the window would be better, but surely not essential!?