Hi clive!
You done a great job upgrading your co!
I wonder how you managed liquid fert adition to metcalfe points, maybe you have some pictures left.
And StocksAg small seed seader was gravity feed?
i don’t use the metcalfe points anymore but when we did we simply welded a steel tubular boss to the back of them that a stainless fert pipe threaded through held in place by a cap headed grub screws