You may be interested in FilletMult.lsp, >here<. It defines an F0 command that works the same as my FZ command posted earlier. And it defines F1 through F9 commands in which you can set whatever radius values you want, if you have radii that you use regularly. Each one lets you Fillet as many things of as many different kinds as you want, and remembers the value set in it, to offer as default on subsequent use, even after exiting AutoCAD completely. So you can set [for example] 215.3594 as a radius into [for example] the F8 command, Fillet things with it and conclude, and next time you want to Fillet things at that radius, just type in F8, and it will offer that as the default, so you don't need to enter it again. [And you can change the value in any of them any time by entering something instead of accepting the offered default.] And they all restore whatever regular Fillet's radius setting was, after you use them. You would want to keep a list somewhere of what radii you have set for each command.
Kent Cooper, AIA