The GRX FD and adapter mount arrived today. I had a few extra minutes and removed the R8000 FD and installed the new stuff. I followed the installation instructions srep by step and it all works very well. There isn’t any chain rub on any sprocket.
If if anyone is thinking of installing the GRX 46/30 I’d highly recommend spending the extra $50 and using the GRX FD. I just couldn’t tweak the road FD enough to eliminate all the chain rub. Now I just need to find some gravel.....