Hello fellow trikers! As I posted in the 559 thread, The Wife and I each have a 559 on the way. I elected for Utah Trikes to add their Utah Trikes Adjustable Cargo Rack to each one. I've never had any kind of cargo system on any bike I've owned. So my question is are racks and panniers fairly universal? Do most have some kind of standard way to attach? As I've looked around it seems they are all kinds of different systems so I'm curious if it will be hard to find something that works or if it's not as bad as I'm thinking. Thanks!