This is a frustrating Idea. I have 3 Clip options one is 1/2, the other 3/4, and the last is flush. There is already the clip drawn as an extruded block but I can not write the formula I need so if one choice is chosen the other two are not and I already have a visibility yes/no parameter on it. I have that working just not the block thickness. Any ideas should I use another method for the formula or should I go about drawing it completely different. Egad, It making me cross eyed Please Help Me!