@dover thanks for that info.
The EA-10 came to me with EP-03 straight armpipe only. I would like to find the S-type armpipe as well, in order to make cart rolling more convenient and also to be able to use integrated headshell cartridges like SPU and FR7.
I know the S-type is much harder to find than the straight armpipes, but if any of you have a spare one lying about or know a reliable source, please let me know. Thanks!