Yes forgot to mention that the spline has a solid section so it only fits in one orientation.
... These are cheap at the moment and in Huddersfield...https://www.ebay.co.uk/itm/234481615724?hash=item369831836c:g:e8AAAOSwCAxiPiS8
The one I got was fine... Hey ho. Sorry for the bum lead.
Got this from China. Works fine.https://www.ebay.co.uk/itm/333255674467
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