Some experiments dont exactly go to plan! The upper arms experiment is a failure!
I had put in custom upper arms from overland plateau an year back or so - while it took care of reducing the stress on steering - it didn't really help as i underestimated the physics side of it.
The upper ball joint was too close to the tires and i didn't have any negative offset alloys or didn't want to put in spacers.
I have gone back to the original arms - will need to keep an eye if it puts any unnecessary stress on the steering. It was never bad, but sometimes we tend to overdo it in enthusiasm! We fail, we learn!