Right, Jay, I am not that exact when drawing in MSPaint ;-) . IRL It will be a Goodall/Taipan cone. My guess is radius ca 3mm. Checked my Goodall cup with a 8mm diameter ball and it is anyway less than 4mm radius.
About the striker strut, my new guesstimate is 7/8" 10 swg.
Last edited by reVintage; 01/10/18 06:03 AM.