Is it me, or is it Heljan. I have an original D8501, runs prototypically (like a dog) but runs. Being of a generous nature I thought I'd buy a version 2 release, D8511, thinking that Heljan might have improved matters in the intervening period. Nope, no way, result one unit which starting giving that burning smell, as did its decoder. It experienced a harsh stop/start motion just before that. So, being of good heart, I thought, oh well, a one off! Bought a replacement. This ran for all of 5 feet and stopped. The lights worked, but know one was there (as it were!). I noticed a flickering of the lights at alternately at each end.
I gave up and bought a new tool Class 33, which was faultless (to date).
I note that a Mashima replacement worked ok, so I reckon I will go in that direction in due course.
What I'm wondering is, why hasn't Heljan got this right?