Has anyone had problems with the new HO Athearn Big Boys in DC? I have 2 and the tenders both do not operate correctly. The sounds don't work right, remote doesn't do much and "timed chuff" is far from timed. Also if I take the tender from my HO Athearn Challenger and replace the Big Boy tender, the loco performs flawlessly. Lastly, I sent both tenders to Athearn for warranty repair and they found nothing wrong??? I cannot go DCC now and the cChallengers are perfect, what's wrong with the Big Boys??