If the operator is under 300, there is probably a margin of error.Here is the link for the MY2016+ 44" or 47" snowblowers.
Here is the link for the earlier 44" or 47" snowblowers.
In the "install ballast" section both have the same literature. I could be wrong if this does not apply to your x370 but it sounds like 2 is what you want (but I don't see why adding another 84 lbs - 2 additional suitcase weights would cause undo harm to the tractor).
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