Hi, i got the answer, all dimension in this drawing is correct, and i do exactly as drawing. BUT, you have been misread some information, that is "R1 TYP" only stated on two typical area, this not correct. Yes i did try on those two area only, the result is same as you, but after i realized on isometric view, i saw all edges in rounded fillet, come to this conclusion, i make it all R1 on all finished radius, then only i got the answer. (Please see my comment on existing drawing). R1 must apply to all sharp edges as a finishing radius.