Are both the Ngineering and Evans lights multiple LEDs (so you get a sweeping motion with the light output)? I have a MARS light simulator from Dallee, which is a single LED, so I think it simulates the variable light intensity when viewed from the front but not a 'sweep' (I haven't installed it yet).
Ray - a slightly off-topic question: you mentioned installing TMCC in your Milwaukee Rd F unit - what did you use - ERR or ?
Thanks, - Rich