That's good to know. I currently have 5100's all around with Toytec 112-620's on front and Toytec Superflex up front. I like the ride but they only gave me like 1.6in on the front and I'm having issues getting the front raised to be level (2nd notch causes issues - not enough down travel) so my only other option is spacer.
I may be considering all new if the spacer doesn't work well.
No issues running on the second knotch with 112-620's and 5100, just NO higher. Should give you exactly 2.5 for the front. I had them for almost 2 years like that and was a great all around set up.