Panels in question are 18mm MDF 48 inches by 24 inches wide which I need to affix to a plastered block wall, preferably without any obvious fixings or gaps.
I have some interlinking clips from a local hardware store but the screw holes are positioned so they also overlap and screws were not supplied. They need to have quite flat heads else the two sections (one affixed to panel the other to wall) will not slide over each other.
When attached the four screw holes line up which makes it even more awkward to find suitable screws anyway.
Has anyone else tried to do this ?.