Tom,
This is already done when sizing your lateral and mainline pipes.

It is when sizing individual valves--there's a check box for using spot elevations. I'm talking about when sizing them all at once.

Tom,
When you check the option while sizing one at a time, it saves that elevation change. It then respects that value when you later size all at once.

Ah! But what about when you haven't sized any laterals at all, and you want all of them to note the spot elevations when sizing all at once?

Well, that will have to be added to the wishlist then won't it! Consider it on the list.