Weird groove in Backing Plate

[DetailKitty]

I bought the FLEX XC 3401 VRG Mini (4 3/8") backing plate for my Flex. I have used it a couple times now without out any issues.

But last time I used it I smelled something burning. I have not smelled this before using my Flex, period.
So I stopped, let the Flex cool for a bit, then took the backing plate off...

The outer ring of the backing plate now has a ring "grooved" in to it... almost like it's not clearing the top of the Flex itself.
I feel like I need to add an extra washer or something?

I will have to take a picture when I get home.

Anyone else experience this?

[Setec Astronomy]

Is it the felt ring wearing into the plastic? Mike Phillips has a thread about oiling it...

Here it is: http://www.autogeekonline.net/forum/tricks-tips-techniques/34201-lubricating-felt-ring-flex-3401-a.html

[DetailKitty]

Is it the felt ring wearing into the plastic? Mike Phillips has a thread about oiling it...

Here it is: http://www.autogeekonline.net/forum/tricks-tips-techniques/34201-lubricating-felt-ring-flex-3401-a.html

It's possible....

I did buy air tool lube for just this reason. The felt ring is pretty dry at this point. I've never lubed it up before since I've had the Flex.

[Setec Astronomy]

I've never lubed mine either, but I'm still on the stock backing plate.