How does one go about cutting a hole in new carpet when replacing old carpet? I was thinking about gluing the carpet down first, over the hole for the pedestal seat, and then feeling around for where the hole is, and then read somewhere to use a soldering iron to melt the carpet around the edges of the hole? I assume any soldering iron will work? Sounds a little tricky to me. Wonder if I might end up melting too much of the edges. Any thoughts would be appreciated. Thanks.