[AlexisGaitanis]

First you change the 2 front screws with   Slot.it Metric Screws 2.2x5.3mm Tapered Large Head x10 Ref : SICH54Bu 
You keep the screws moderately tight so that the pod moves up and down but not sideways,youwill  find the right amount by trial and error.
Then you can add suspension using the 2 rear screws and either springs or magnets.Ensure that the pod moves up and down freely not scratching the chassis.