Focused too much on router!A table saw
Good idea. ThanksI was thinking two 45° table saw cuts and nibble away the middle with a FTG blade to the desired width. Full disclosure: I have never tried a cut like this.
2 router bits here. a 45 degree on either side, flat bit don the middle to get what the 45 degree bit missesWhat router bit is best for this vertical groove. 3/8 inch flat cut with 45 degree angle out