Tommy this is really cool. I get a subscript out of range if my scale is too big for my drawing size which is to be expected. I can't get it to set the drawing units to architectural, always defaults to decimal no matter which radio button I select.

My personal preference would be not to have it draw dim line between extension lines.

I'll be looking to see if I can make the necessary changes but I really like it. masaud has his work cut out for him.