ya we have 2 DSP400s. one is faster than the other. OMG i know what you mean about the caster sweeps taking forever. i had the DSP600 when i went to Sears alignment school and i fell in love. we would go and draw smiley faces on the sensors so when the next group would do their alignment they would have to view the sensors. i do have to say that the shim, and bushing calculators are a gift from god. the i-beam bushings take about 5 minutes a side now with those. and WinToe is the best invention ever, although i have noticed that if i have to adjust toe more than .6 i have to constantly reset the steering wheel. i usually just end up locking it and adjust with the car running.