Larry,
Forcing Spin Doctors? Spin Doctors have a speed range of 1.5 - 4.5 on the fast setting and .5 - 1.5 on the slow setting. If you can't get hits on Spin Doctors in a current, try changing the setting. With a speed and temp unit, you should be able to get a Spin Doctor to work. If the speed at the ball is 2.8 in slow current and 2.8 in a stronger current, the Spin Doctor should work them same. Just adjust your boat speed.