Hi Bla bla,
I also have a IMPULSE from BN Models which flew more then 120 flights... and I had YS 140 DZ Dingo engine on it...but for a few months I had a lot of problems with Dingo and now I am planning to change with OS 140 RX ... please let me know your feedback about os 140 & impulse combination after you fly with it ....
Happy Landings
Oscar