Hi Paul
The bit(s) you have should do the trick BUT the chips loading up in the slot can be the error and it's not safe to back up to clean them out.
But you may want to try a 3/4" bottom cutting bit,this bit is set up to cut the bottom as well as the sides unlike the standard 3/4" bit that has a blank spot in the center of the bit,that's to say the carb.part of the bit is not set up to plunge in to the stock but it will cut fine when you move right into the stock.
Cutting a 3/4" wide slot 3/8 " deep should be duck soup for your router,take a look at the jig below in the snapshots, It's best to use a plunge router for this type of job with a vac. pickup BUT this jig will let you use it on the router table also and you don't need to keep it sq. with the table top, because the brass guide will do that for you.
You can make the jig as wide or as how long you want it to be the key is the 1" slot for the brass guide to run in.
When I use the jig on the router table I put in a P.C. insert I made to fit the opening because it has 6 1" holes that let the router table vac. system pull the chips down the opening in the plate, it will not take all of them into the vac. system but most will go up the hose into the bag.
http://www.routerforums.com/attachme...achmentid=2617 http://www.routerforums.com/attachme...achmentid=2618 http://www.routerforums.com/attachme...achmentid=2619 http://www.routerforums.com/attachme...achmentid=2679 http://www.routerforums.com/attachme...achmentid=2677 http://www.routerforums.com/attachme...achmentid=2680
Bj
