[Watermaker]

Have a 2021 ZL1 1LE stock at the moment. Purchased Apex VS-5RS 18 x 11 ET35 wheels and Nitro NT01 315/30-18 tires (squared) for track set. Running Sonoma, Thunder Hill and Laguna Seca currently. I am reading that I will want -3 to -3.2 camber, but in order to do that with this set up, I need to make some changes to the struts for clearance. Ordered Ground Control (GC) tops. Per GC, I need to drop my struts and send to them to remove the stock tops, which are welded on (I have the blue stock tops now) and they will install their tops and return the package ready top reinstall in car. They say I will get up to -3.5 with their tops. Wondering if the strut body will still need to be ground down for clearance as shown on various threads and even on the Apex site when using this wheel/tire set up on stock strut packages? Any advise would be welcome. Thank you!