Stunning pen Johnny but the finial just doesn't look right. Could be the photograph.
I use the big Grabber from PSI, it is for 10.5 & 12.5 mm pens , great piece of kit, also got the 7 & 8 mm grabber but do not use that one so much..Still a smart looking pen and A lot better than I can do. Just been looking at closed end pen mandrel so will be following in your footsteps soon.