When you have to fix something, you need proper tools, you have to use them in an appropriate way, and before starting, you have to read the manual.

That is stating the obvious and it sounds simple. But many of us know that we usually start working with complex (mostly electronic) devices without reading the instructions. And if we unexpectedly do read the instructions, we take shortcuts during the procedure.

That is what seems to happen when interventional cardiologists are instructed to use the 4P's to do a proper job [ ]. Ozaki et al. describe in this issue the effect of procedural technique on outcome following second-generation drug-eluting resorbable magnesium scaffolds [ ].