New and i've got a question... or 2

The Ofna diffs are the ones sold with UE diffs and with few exceptions, I've not read any complaints. They do require some periodic maintenance as any diffs others do. I put the Ofna diffs in the hybrids I bought basically cause I had a spare set. From what I've read the HB diffs work just as well, just be sure you understand which gearing you're getting if you go with the HB diffs, cause there are two different ratios. Bot require re-gearing, but the higher ratio will require more serious re-gearing.