Is there interchangeability if we want to replace a part of the 2-digit conventional modular units w

Interchangeability between the 2-digit (AC∗∗) conventional unit and refresh unit (AC∗∗-A) is as below. 
　　[Interchangeable: AF, AFD, AFM, AL, Attachments available as option]
　　[Not interchangeable: AR, AW] 
　=> Refresh AR and AW units have interchangeability by replacing a spacer with a refresh spacer.