I think the downforce issue is dark hole to go down. We ran Thunderslot 4 times before last Saturday and we never had a limit on downforce
By far the biggest factor affecting downforce is tire diameter. Downforce is inversely proportional to the square of the distance between the motor and the braid on the track. If you halve the spacing the downforce would be 4 times as strong.⁸ To decrease downforce, true tires to a larger diameter. With the Thunderslots I think we are all using as small a tire diameter as we can get without the chassis or spur gear dragging. Motor pods in a series with adjustable offset ùmotor pods, the downforce would be adjustable. I think trying to adjust downforce with magnets would be a futile exercise. Buying extra motors, mounting them in a chassis to find acceptable downforce would be expensive and probably also futile. We ran the series 4 previous times with no limit on downforce and my preference would be to “forgit about it”.
Russell