I just edited my response to add a bit of stuff so not sure if you've seen it all.
The website has info on cutting the bridges but I think the simplest is an exacto knife rather than a small power tool - don't want to take too much off.
The overclocking kit I'm considering has 3 bottles with it.. a gap filler for the laser cuts, a cleaning fluid, and a conductive grease to bridge the filled gaps and/or cuts. The nice part is that it is removeable. Perfect if you just filling in the L1 Bridges, and makes it a lot easier reset to a different multiplier if using the L3/L4 and need to change it [img]smile.gif[/img] Only drawback is to be careful you don't smear it installing the cpu back in the socket.
I'm thinking I might get a kit and try changing my 1800+ from 11.5x to 12.5x someday.. but not until the warranty is over as I too would have to cut a bridge :( ( so won't even buy the kit for a bit. )
I don't know who makes the o/c kit, but if needed, email me at [email protected]
and I can give you a link to a store that sells the removeable kit online.