More power for the 2.8l diesel pajero

The pajero with the 2.8l diesel and 260,000k has not been on song for a while now. Doesn't like winding out and feeling like it is gasping for breath after a bit of a work out. 10 years old but not as old as it's owner. Was one gear lower on the long climbs, and overtaking required even more of a windup.
So I installed an electric fuel pump as a lifter pump near the tank, and amazing stuff, it is back to it's old ways.
Have been through a new fuel filter every 5 to 10k (20k by the manual), and rebuilt the injection pump. Injectors serviced as well in the last 12 months.

Gut feel is about 10% more power between 2000 and 3000 rpm, and it doesn't run out of breath anymore above 3500rpm to the 4500 rev limit. Also about 20% more power in that 3000 to 4000 rpm.

Reckon it is like a friend who got a pace maker installed. World of difference.

Discussed it with a couple of diesel experts and the mechanical lift pump on the motor has a return line back to the tank, so if the electric pump gets a bit enthusiastic, the excess fuel will just return to the tank anyway.