Hi Slimboyfat
Are you aware of the connection of the Christadelphians to Benjamin Wilson who wrote the Emphatic Diaglott?
I am not an expert like you but I put this here in case it is of use/interest to you.
Benjamin Wilson joined the Cambellite movement (followers of Thomas Campbell) but he split from that movement circa 1850 due to doctrinal disagreements.
In a publication by John Thomas (founder of the Christadelphians) called, The Herald of the Future Age, Benjamin Wilson expressed his views on the immortal soul. This was the initial cause of Wilson's break with Campbell.
So Benjamin Wilson, who wrote the Emphatic Diaglott agreed with the founder of the Christadelphians on matters to do with the soul.
https://en.wikipedia.org/wiki/Benjamin_Wilson_(biblical_scholar)