Djstinger
The Mosfets have a lower "on" resistance than transistors. So, it possible to see stock motors perform better with the 6401 repair/upgrade.
Also, the SuperSlick motors are fine to use. Thats why I selected the 6401 as the replacement. It will handle them with no problems.
Tony
ARS Software & Innovative Solutions
http://www.falcon1.net/~ars/rcmodels.html