OE Camber Issue, Parts Advice Needed Please

Tractionless

I've owned the car under 2 weeks, it needed rear tires which were worn from inside out. Everything is 100% OE and staying that way. Upon having an alignment done yesterday the tech. could not get the drivers side less than -2% (at max adjustment) so he set the passenger side to -1.7%. He noted the condition of the suspension seemed fine. The before passenger number was -1.4% and tire still wore unevenly. My goal is as close to manufacturer's -1.2* or even less if possible.

I've searched and found rear camber links but then also found SPC camber/toe bolt kit as described below. It says the camber cam bolt allows for +3* to -3* adjustment. Will just these bolts fix my issue? I'd prefer not getting into new bars if possible, unless that is an easier install than the bolts. I see the toe bolts require grinding but haven't found the DIY for camber bolts yet. If my toe is in spec. do I still need the toe bolts for when I try to "straighten up" the camber? Thanks for any help you can lend !

Product Description (# 72265 x 2)
(This sale is for both sides / both wheels)
SPC Performance Alignment Rear Camber/Toe

The 72265 Rear Kit. These cams replace the OE camber and to adjustment cams and provide additional camber (+/- 3.0 degrees) and toe (+/- 3.0 degrees) changes. This is the perfect kit to adjust rear alignment angles for optimum handling and maximize tire life.

Rear Adjustment range: Camber ±3.00 degree Toe ±3.00 degree
Installation time: .6 hr/side
Required: 1 kit per wheel (This sale is for 2 sides / 2 wheels)

This kit uses a larger cam washer to achieve greater adjustment than the OE toe cam provides. In order to take advantage of full toe adjustment mark the area to elongate the existing toe slot with template provided.