Reply to question about arcade overlays v.3

so i remember ean mentioning in one of the videos that the new arcade overlays were designed to be able to just throw on over an existing overlay from a previous arcade mod. if this is the case, would it not be a good idea to use this overlay if i wanted to do the arcade mod right now. since i dont have an existing overlay on my vci, would this new overlay not fit correctly? does djtt plan on releasing any v.3 arcade overlays that fit like the old ones did, ie designed to sit under the buttons?