Airlift Manifold Leak - Fix - Cartridge Swap

Airlift 3p Manifold 3/8"
Bubbles were forming around the brass ring against the Manifold under pressure on the front right and rear left connection points.
I have changed the cartridges for new ones (link below)
Tools used:
2x Clamps
1x microfiber towel
1x Small flat screwdriver
1x Medium flat screwdriver
1x Large flat screwdriver
1x Long nose pliers
1x 16mm socket
1x Hammer
1X Circle file - may be needed
3/8" Cartridge thetuningstore.co.uk/air-lift...
1/4" Cartridge thetuningstore.co.uk/air-lift...