Help! I took apart my VLS 500 head (very much like the more standard CLS 500/501) to replace the burned-out leads that go to the bulb. So I solved that problem but in the process disconnected the mechanism that switches the filters in and out of the light beam using the lever on the left-hand side. I managed to put it back together again but there is a single spring which I can't figure out how it is installed - either on the lever or the internal mechanism. Any ideas? Thanks for your help.
The spring:
The lever:
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