Yeah I've replaced most of the bushes, installed idler arm, tide rod ends, kings springs, camber tops, and new tyres and rims with wheel balance and alignment and still got the shimmy at 60-70Km/hr. What's next is new shocks, bearings, front swaybar bushes and lower ball joints. Hopefully it will go away.
Are you going to improve on the McPherson strut design, or tackle a double wishbone suspension conversion?