My .40fp is a reliable engine and is still in my collection. I also have an Enya .15, Enya .19, and an OS .15fp. All bushing engines. The Enya's are screamers while the .15fp and .40fp just don't seem to turn up. The la series again while reliable just don't seem to turn up either. I know there were some articles written about hopping up the fp/la series engines a while back.