L86 Dimmer Module Choke Retainer Versions

On L86 dimmer modules, there are two versions of the torroid holder.

• The old style is a "X" shape (ETC P/N 1086A3040).
• The new style is a "flat bar" shape (ETC P/N  7050A4024), which is the same as the Sensor modules.

These two types are not interchangeable;  the length of the bolt that the choke mounts around is different.It is extremely difficult to tell the difference by physically looking at it. 
ETC recommends that you replace the retainer with the same style.