The module has trouble fitting in the Durasig housing, the original gasket is too big. To get this to fit in here I have to use a smaller gasket.

Do the EOI modules have trouble with most fixtures? With this one it has lots of trouble, I dunno why.

And these look pretty incandescent looking. Who likes the star effect on these?

Its because earlier DuraSigs (generation 1 and generation 2 versions of the signal) were designed with a slightly larger lens opening. There isn't any clearcut reasons why Eagle did this, other then to make it so they could be the only ones supplying any replacement parts. So its not too uncommon to see gaps or other means of fitting LEDs into older DuraSig heads.

This issue was resolved when the doors were redesigned in the 3rd generation version of the model. Easiest way to tell if your section is a 1st or 2nd generation is to open it up and look for the reflector bosses in the housing. If they are not there, then its the earliest DuraSig version (aside from the prototypes without the DURASIG logo on back)

This is a second generation, the visors don't have the srews on them.

And the module is too BIG to fit in this, it doesn't want to go in all the way with the original EOI gasket. It just is a bit too big. One side goes in fine but the other side pips out, so the opening is a bit too SMALL.

Weird...the Dialights that I've had experience with fit loose into the early housings. Generation 1 and Generation 2 BOTH used the slot/tab style visors. Generation 3 uses screw on to interchange with the Automatic Signal visor.

With the other gasket the EOI module fits a bit loose, but the original gasket to the module it won't fit at all. I don't get it.

EOI's don't have trouble fitting in other housings.