10mm spacers

After trawling through the forum I still haven't found a definitive answer to thissss so:

Got myself some 10mm spacers as said above, stuck them on and im getting 5 and a bit turns. I've seen and heard you need somewhere between 6-10 turns, but I've also seen I'll be alright with 5 and a bit:p So anyone with experience/ the knowledgeable, do I need extended bolts?:)
 
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