you are MUCH better off using a bodyshell reamer to gradually widen the hole until it just fits over the durango stuff - it should be perfectly centred and have no wobble that way. You'll end up with a slightly cone-shaped hole, but that doesn't matter at all.
I've done this with B4 spurs when fitting them to the Tamiya DF03 which has a bigger hole in the centre and it worked perfectly.
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