Thanks That seems to work!

From the name I thought that would limit the total bandwith both up and down (which I can see for people who's ISPs force transfer limits).

...

Oops, I may have spoke too soon (I'm editing this post). If I set my upload limit to 30k it's actually dropping *way* below this. It looks as if it keep lowering the upload bandwidth until up + down = 30k. This can grind uploads to a virtual stop which isn't want I want. I just want to keep the upload bandwidth below 30k (since realistically that's all I can serve). Download should go as fast as the remote side will allow.