flexbody focus screen adaptors

Hi Everyone,

New poster here and new Hassey owner. I recently purchased a flexbody that came with a 41057 Focus screen adaptor instead of the normal 72405 original to this camera. It my understanding the 41057 is for use with arcbody instead of flexbody. I have not recieved camera yet but are these items interchangable. Any issues with using the 41057 on the flexbody??

Thanks in advance for your help.