Bose-X
You understand the situation.
But if you are to do a revalidation in RV4 for example. Do you log yourself as a PIC and the "student" as Dual even though you don't have full controls. I think somewhere the rules also says that to be pilot in command you need to have full controls.
And if you are giving the PIC to the "student" in the revalidation flight then EASA rules also says that the instructor can log all flights as PIC.
Should both the instructor and student log PIC at the same time?