I have added, inspired by a posting of jrmy_1, the iphy (inch per hundred yards) and cphm (cm per hundred meter) units of angle iphy=tan(angle)*100*0,9144/2,54) and cphm=10000*tan(angle)
e.g. =bfx_u("iphy";1;"moa")
to install the update you can use the setup or simply replace the .xll file