So what exactly is the IQ 78 doing? Is it still too strong, too early, or is it weaker than what you thought and need something a little stronger? My concern is that if you have slower ball speed and you are using a core with a lower RG, the core will want to help start the motion a little too soon. I would never suggest a urethane for someone with slow ball speed because they tend to want to dig a little too quick and they are not typically successful moving inside and swinging them. You could probably get away with the NU because there is enough resin in the cover to consider it as a non urethane and the core would allow it to be longer down lane and more continuous without being flippy and uncontrollable.
For slower ball speeds (under 15 mph at release), I would suggest balls like the Tropical Surge or even a Twist with the Hustle line and Raw Hammer line as a step above that. The big thing is to get balls that have lower differentials (lower than .035) as a way to control the backend. But at the end of the day, I would look at the Hustle RIP as a starting point as long as you are in the 15-16 mph range at release. If you think you are slower than that, then may want to consider a Tropical Surge.
