Thanks.
Been checking options price wise online and the Timesert is considerably more expensive than the Helicoil - somewhere in the range of $250 to $30.

Is it worth it?

I have never used either before, although neither sounds terribly difficult and I have a pretty nice, straight shot at the hole.

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RG Newell

1984 300D
1972 250
1986 560SL
1991 300CE