Save patch (incl Send/Bus settings) for use in a different project

Logic Pro X

Save Channel Strip Setting as .CST file, then opening that .CST patch in a new project, does not seem to retain the Send / Aux / Bus channel.

Eg Adding the Boesendorfer Grand Piano, automatically adds Bus1(1.6s Short Vocal Hall) and Bus2(6.6s Botta Church). But if you tweak it slightly, then save the Piano channel as MyPiano, then open a new project and add instrument MyPiano (from User Channel Strip Settings), it does not bring in Bus1 or Bus2, so it sounds completely different.

I'd like to be able to tweak a patch (including Send/Bus settings), for use in a different project.

Nick