Bosch has their own system for mounting guide bushings, which uses a bayonet locking mount. To use the more common PC-type guides (as are included with the dovetail jig), the RA1129 adapter is needed to use with the regular Bosch base plate. Alternatively, you could buy an aftermarket base plate (such as from Rockler) that will accept the bushings without an adapter. Good luck!I think the dovetail jig comes with those adapters. At least I hope they come with. I’ll have another look. Happy Holidays!