So i just recently realized that a 9mm and a 10mm are for some reason both considered a 00? so my question is if my 00 plugs that ive had in forever are 9.2mm or whatever would it be ok to size up .8mm or whatever the difference is just by dead stretching? i dont have a 10mm taper or anythiing and was just wondering if its even worth buying one. p.s. i know its not good to dead stretch but ive done it before with no problems i dont see the big deal if the new plug slides right in? 

 There's nothing wrong with dead stretching as long as you're not forcing the plug into your lobe

Yeah, just wait long enough to the point of where it isn't even really a stretch and you're fine.