I've never tried it that way Paul. Sounds like fun.

I suppose it's the boring way but I always do it from inverted. Slow down and nose up with some extra down elevator and then just as it stalls I push the sticks either towards each other for a left spin or away from each other for a right spin while holding full down elevator. Some models work best with throttle and some at close to idle. Don't idle it completley or it may die. And like Paul said an aft CG that makes the model very close to neutrally stable is best.

Another way I enter them is a 1/2 loop and just before you hit the top with the nose up about 20 to 30 degrees jam the sticks as above for an inverted snap roll and hold it so it develops into a spin. If your engine is strong enough to keep it snapping then reduce power during the first snap.