Shortening Renthal Handlebars

[Ingah]

Got a quick question as i'm sure someone's done this before.

Having bought Renthal road bars (medium), i am wanting to shorten them by cutting off about 2cm off the ends as they are quite abit larger than OEM bars. However, i have noticed there is this 'red thing' (technical term ) inside the bars, that i assume is there for the bar ends to brace up against/be held in place by.

How do i / can i, move this 'red thing' further into the bars, otherwise by cutting the 2cm off the ends i imagine the bar ends will no longer fit in properly?

Cheers,
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-- Ingah

[Fizzer Thou]

Is it an insert that the bar-end screws into?

Is it held in place by friction?

Any chance of a picture?
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Just talk bikes.What else is there?

Always have a 'Plan B'