Serum had the
1930/8 in a Revo
I use a 1930/8 in my 1/8th scale buggy, very fast spool up on that motor. I also use a 1940/7 in it as well for more speed (1930 will get a bit hot if geared up too much). I also have a little Lehner in my M18T.
They are the most powerful motor per pound. I think they may be slightly better than Neu's and far above Pletts (I don't like Pletts much). Finedesign is the only place in the US to get them. You can also order them direct from Lehner (expensive). If they were more readily available in the US, I would probably run them in everything.