I think you need to explain your idea a bit more, it doesn't sound logical to tap the spigots then cut them off, as mentioned it is possible though allegedly difficult to remove them at which point the kit on ebay would potentially be a neater and simpler idea. Out of interest how are you planning on cutting them?
Good luck with it. I have just done another one yesterday & I will say it again, it's a pain in the ass of a job. 2 & 3, piece of cake, takes minutes but 1 & 4.. .