Turbomar
Yes a 20mm is plenty, like I noted in my last post the 10mm hub centric spacer is almost wide enough, I think a 12mm would work, certainly a 15mm would work; my front end is lower with the K&W springs, so I am trying to keep the spacer to a minimum. This is for NA wheels, the SRT wheel had a good 8mm clearance. It was your video that got me trying all this!

Dan