I replaced the nearside springs back in 2013, and one of the cams were disturbed, so I got the garage (Mx5 City) to fit the offside pair and full geometry, I asked for no explanation, simply that it be done. Clearly it was, and the pronounced left following my own accidental geometry tuning was corrected. The meandering I put down to worn rears, which I changed recently. This made no difference, so I started to wonder if there was something more amiss, especially having aborted an overtake on a B road, where the sudden tuck left took me by surprise. I went to a local road and tried to work out what was happening. I could see that the nose tucked when committed to a corner - I guess you'd say oversteer, but when having exited the final left, and accelerating in a straight line, i had to correct against someone else coming in the opposite direction who went for an overtake, 45-50 mph ish. And again that flick left and lift off saw the car fishtail through a number of oscillations, with me having to countersteer against each flick. To be honest I was bricking myself.
I dug the figures out and came here, looks like it's not a good setup, irrespective of what it actually is 2 years down the line.