I fixed a cross thread in mine with a thread tap (to clean the straight bit) and then a wheel bolt (bought off ebay) with the correct thread to straighten the bent ones from the inside. It was a little tricky to get it started from the inside as the thread isn't a clean taper there, but a bit of gentle fiddling got it in. Its now used on the track regularily.
Some of the cooling ports are blocked by the gasket.
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