Couldn't get a grinder before Lowes closed so I hacked away with a sawzall. Cut off about 1/4".
First cuts
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Ending point. Need to get a grinder to smooth it out.
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In order to not rub against the KDSS, I need to pull the spare back so that the lip of the hitch falls in between the treads of the tire. If I do that, then no rub. In order to get the spare off, just need to loosen it a little and push it off the lip of the hitch.
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I will only be using this for lightweight duty (bike rack, cargo carrier) so I'm happy with the results so far. Thanks to
@Dazed for the idea!