I've not used frame fixings, but I beleive the idea is that you can push the frame up against the wall and then hammer a combined plug and screw in and do it up.
Is that correct?
Do they have oversized screw heads?
Are they made in smaller sizes such as might suit a light load such as skirting?
If not is there something else which would avoid the need to keep taking the board off and on?
I don't want to go down the adhesive route, as that has already failed in this particular instance (actually it was mostly the plaster that came away rather than the glue - hot conservatory and duff plaster).
TIA
Chris