hi, sorry to resurrect this older post, but I am about to hyper-tune my heq5 pro purchased 2019 new
and need some clarification. I have already done a Rown belt mod. From the heq5 rebuild guide
on astro-baby.com I can see that you need:

1 taper bearings per axis (SKF 30205) = 2 in total
2 deep groove ball bearings per axis (SKF 6006-2Z) = 4 in total
2 deep groove ball bearings per worm gear (SKF 628/9-2Z) = 4 in total

what are the other 6006-2Z bearings for ?

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