About the Differences Between Front and Rear BR-7800

I wrote about this some time ago — that Shimano's BR-7800 has different arm lightening cutouts on the front and rear
(see here)
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Today I had a chance to "wash" a brake,
so I was able to get some clearer photos.
By "wash," I don't mean clean it with water —
it's shop slang we use here that refers to a certain small modification.

Some of our customers come in saying "wash my brake" and bring theirs in.
I do it from time to time,
but you can't "wash" a BR-9000 series brake.

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Before the "wash," I actually gave it a real cleaning.
Since this is a part that normally doesn't get washed, might as well.

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↑Front C-arm rear side
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↑Rear C-arm rear side

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