Different images will become a support nightmare, if for every "it doesn't work" post we first have to dig into what is and isn't installed in the image.
What might be a possibillity is to make samba optional for all. Those upgrading with a backup will not notice it (as autoinstall on restore will install samba too), others will have to install it when needed.
I don't think however it will make much of a difference. If I look at the solo2, the 7.3 image is 91.3MB, the current develop image is 130.6MB, which will definitely not fit.
I found problem.I had picons on external disc,so i delated and installed again on internal storage of box.Now seems to be OK.