With the 19mm rear sway and Kartboy's the struts do need to be rotated. There is the tiniest bit of the top endlink bolt that does touch the strut when at compression. Barely noticeable if you raise and lower the car but it's easy to get that to happen while cornering. If you tighten it a bit further than recommended spec it will quite down but not recommended. That RCE bar will need the struts rotated for sure.