Fillet a Corner Full of Lines and Polylines (Tip #2111) from Lanny Schiele is a power tool with a specialized purpose. This utility is applied to a corner where many intersecting lines need filleting with variable radii to maintain a constant offset. Instead of selecting each line pair and calculating the new radius value, load the LSP file and type MFILLET at the Command line. You need to input four points and the inside-most radius value. After supplying the radius for the inner corner, pick a point inside the corner group followed by a point outside the group crossing lines and polylines approaching the corner from one side. The virtual line between these two points should intersect with all the lines and polylines coming in from a given side. Next, the program will request the inside and outside points covering the lines from the other side. The rest is automatic and quite impressive. This utility demonstrates some very sound programming methods and exploits some of the powerful VLAX functions in Visual LISP. Great programming, Lanny, and thanks for another wonderful tip!