I have some issues going on with my car and one of the things I need to know is whether I should have my blue tops cleaned and checked (around $90) or step up to the TurboTweak 60's ($370). My mods are in my sig and I will be installing a CAS V4 very soon. If I was starting from scratch I would go 60's no question, but if my blue tops are good do I really need to replace them with my mods? Currently 15 psi with stock turbo with 770 O2's adding 20% fuel.