Check it out.. ACT-R/S bugs crushed and this is the latest, greatest model fit:

RMSE = 0.6s (data 0.9s)

r=0.98

all ACT-R parameters are default.

ACT-R/S parameters: mental-rotation 100 deg/s, mental-translation 5 m/s.

Model parameters: attending time 0.5s (time to study a given target)

200706071912

Next up: how does it look when we bump it up to 8 targets..