Hi all, thanks for the quick responses. Zilla, when you called RR, did they say there was any reason to put one set of springs front or rear? I understand that "O" means "these springs are fine" and "+" means "these springs are fine-er", but that really it just means they both passed QC at OME and really they should perform identically. Discussed by ARB in a blog post here:http://blog.arbusa.com/?p=55. With that in mind though, it seems that maybe I'd want the + springs in the front because it's heavier? Or do I want the O springs in the front because they will be slightly softer? I'll certainly give RR a call, but if they are just going to tell me "oh yeah, those symbols just mean that the springs are different degrees of acceptable", is there any wisdom someone can share about whether there is a reason to put one set in a certain place over the others?