RE: DA / DL observation
Recently coming into the gas engine size range on aircraft, I was torn between either a DLE or DA engine for a 50cc class airframe. I only ended up with a DA b/c i bought a turn key package. I will, however, say that I have seen many DLE's run alongside my DA and many other pilots DA's and they all run well. If someone hadn't told me what was under the cowl, i wouldn't have know the difference.
IMO, get either engine, run a quality oil at an acceptable mixture, cool it properly and just fly. \
Also, It was nice to read what T.O.M had to say about engines. Lots of good info inside that guys head