What Have You Done To Your Tdm Today?

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This

 

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Liberal soaking in penetrating oil for a week, a rawlbolt and it still needed heat to budge.

 

Given how obstinate it was in moving I expected to see more corrosion. 

 

Thanks to all who posted tips for this P.I.T.A. job.  I'd have got there in the end, but they saved me a lot of time and swearing.