So I draw a lot of pitched pipe & I noticed every time I start & stop they start adding up. I just counted 730 dimensions. In other words I start drawing drainage pipe, say I want 10'0" center, I have to search through 730 different elevations. I have every height from 10'-8" to 10-9" & at least 30 in between incuding 10'-8 35/256". This surely must have an effect on the performance & is also a huge inconvenience. Is there a way to delete these as they keep adding up?