[Mike Copioli]

Originally Posted by lynca

I hope they reduce the price or introduce a cheaper speed controller in the 20Amp range..

This would not reduce the cost any significant amount. The only difference between a 20 amp design and a 40 amp design is the choice of FET's. A Fet with a lower continuous drain current would most likely have a higher Rds on(drain source resistance). This would cause more heat rise/power dissipation than a higher current device. The cost to assemble, test and the part count does not change. Your $90 controller would become maybe $85. I think the 5 bucks is worth the extra efficiency and power.