searched, but got alot of conflicting opinions. anyways, i was wondering what is the purpose of a blockguard? some said that it is to keep the sleeve from shattering and instead just cracking, is that its only purpose? also, does the use of a blockguard allow for more boost? finally, does anyone suggest using a blockguard like str? or should i just forget about it and save the money for tuning? suggestions are appreciated. thanks in advance!!!