Maybe you could switch off prime towers in the slicer, and make your own in CAD, as part of your design? Then you can make them exactly as you want?
Similar to the way I make my "dummy cooling towers" in CAD, to move the nozzle away from small objects, so they get more cooling time.
The green cube here is a dummy cooling tower, otherwise the top area of the yellow part would not print well, it would deform because the heat can not escape. These models are quite small: for reference, text caps height is only 3.5mm, and text legs are 0.5mm wide. The dummy cooling tower has a custom brim, also designed in CAD, and a hollow area at the bottom where no cooling is needed.
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StevenD90s 3
I try to avoid tall prime towers for the same reason.
I have tried:
1) reorienting the part so the prime tower does not have to be so tall.
2) widening the tower so the base has more strength (maybe 40mm diameter),
3) I always add a brim to the prime tower for better adhesion in the "dual extrusion" settings
3) and finally I would try slowing down "prime tower speed" in the speed settings to 20mm/s or less for both extruders to minimize the lateral force.
Best of luck to you!
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