Max Width of front frame on RSeat S1

[amogley]

Hi all, I have a NLR Triple Monitor Stand, and the width between the stand legs is 63cm. I want to get an RSeat S1, but I can't seem to get a clear idea of the width of the front support (the maximum width of the frame from outedge to edge).

Does anyone have the S1 seat and could tell me what that measurement is?