The issue isn't with the regen itself. The issue is a few years from now when the DPF fails, your tractor is worth ~$12k, and suddenly you must spend $2k or more on it that serves ZERO purpose other than to put a smile on the bureaucrats in DC.Are you one of them? I'd love to hear from someone with actual experience as to why the tier 4 systems are inherently flawed/inferior/crap.
Anyone that I've heard from or talked to that actually are running these systems don't seem to share the opinion that it's something specifically to avoid.