You might also set a maximum and minimum distance on that distance param. I set it to 0 and when attempting to restretch it was a little wonky. So, I set the minimum to 0.000001 and it keeps it from being useless. Also, if you don't intend to scale the size of the block, you could set the maximum distance to 0.5. Even if you do intend to scale it, if you can set the radius then scale the block a 0.5 should be good. If you let it stay anything larger, you get lines that are inverted to the arc. Very nice trick none the less there Kate.