I'm looking into using a few of these connectors for track power control (on sidings). Have any of you guys used them? I've used the connector with the black case and 3 yellow switches once and it worked alright, I'm just thinking the HD one will be better for this application. I might look at using the twin for a passing siding I have too. Any thoughts? I'll also wire these in conjunction with an AIU so I can use one or the other for power control. These pictures aren't the greatest but it shows you what I'm looking at doing. I have 8 stub end sidings and 2 passing sidings I want to control.