Reply to VCI/Arcade button Dimensions

HI,
I'm still believeing about modding my DM2 with arcade buttons. Can someone give me the dimensions of the arcade buttons, and the depth of the VCI-100 so that I can decide if an arcade mod can be done on the DM2?

I'm also considering doing the mod to my DR-202 (I could easily fit AT LEAST 8 arcade buttons on that bad boy...)

Cheers!