The MVVS & Thrust HP calculator significantly over estimates the real world thrust you will actually see on a plane. The DA 50 or BME or ZDZ or Brison 52 will not give you the blast out from hover performance you are looking for in a 19 lb plane. You can add a tuned pipe but then you will have close to a 20 lb plane. The kind of performance you are looking for with the DA-50 comes on a 15-16 lb plane. I have never seen a DA-50 on a comp 2.3. I have seen them with a ZDZ-80 and I still don't think it had 1/2 throttle hovers. Your best bet is to find ways to lighten the plane.