Good drawing, but I don't see how the pressure switch is going to
control the well pump. Normally the switch needs to be before the
booster pump with that pump having its own control usually activated by
flow, not pressure drop. that makes for a smooth running system with
little pressure change regardless of draw. Booster pumps also require a
check valve, to keep the high pressure isolated from the low pressure,
if the switch in the drawing is the well control switch the pump would
be in constant off mode due to the pressure on the high side of the
booster.