have played a STNG with all LED mods throughout... looks AWESOME. Being able to match LED colours to insert colours really gives a new depth to them all.. the purples were just beautiful.
As for the constant cycling - this shouldnt happen on a pinball.. the flicker on many LED signs is due to the SMPS that runs them... some of these are only 30 - 40hz and is noticeable to the eye.
Frequency on a pinball transformer is 50hz and is a different way of delivering 12vDC ( or do DMD's have SMPS in them?? i doubt it)