Hawker

Has anybody resolved this? I currently offer USPS Priority express for US, CA and EU as the only option. All my current products are over 1lb and a good fit for this. I wish to offer some smaller low cost items so wish to offer USPS First Class for all shipments <16Oz for US only. But that darn infinity symbol makes it impossible to make this work. For orders <1lb ideally they can still select USPS Priority at the higher rate, I just want to offer a default lower rate. I realize I could put the USPS Priority rate in for 1lb - infinity but then the customer would assume it was going first class and not Priority which is misleading and inaccurate. How do I set this up?