Will do that. If there is sufficient interest, I dont mind doing a small batch on the mill. It would only be fairly simple tho- anyone with a block of ali and a free hour (and a mill) could make one.

Its important to note that its the MOSFETs that get the abuse on the speedo, and its a rule of thumb that a reduction of 10 degrees at the junction of a semiconductor approximatelly doubles its life, and especially with people drawing 50A through those poor little to220 packages, cooling is important. For a few grams extra, a fan has got be to worth it. I have built a speed 300 motor powered fan, which really howls, and, once i stick it on my modded heatsink, should ensure long life and excellent performance- forgot to mention above that as the mosfet heats up, its on resistence increases, thus making it heat up even more- its all wasted power that could be going to your motors instead of damaging your mosfets.

Stay cool

Ed