I have the LA40/46 (same case) and an Enya 40XZS, the new stunt motor (smaller version of the new 61CX) and can tell you the mounting holes are quite different, if that is what you are asking. The Enya 40 does swap directly with a Magnum 36, if that helps. The larger Enyas appear to swap with larger Super Tiger engines (the 61CX is interchangable with ST51 for example).