Quick fridge mod

I recently bought my home and finally decided to change the fridge handle/hinge sides so that it opens towards the counter. While I was at it I cleaned the condenser area and made a couple mods to hopefully improve the efficiency.

There was a cover over the compressor/condenser area which appears to be holding in heat and reducing circulation. Not sure what the purpose was exactly, so please let me know if you know better and think I should have left it in. I also placed a spacer between the wall and fridge to keep it a couple inches away and further improve circulation. Lastly I removed the front bottom grill since you could hardly see it anyways.

Also, the manual states that this is a maintenance free appliance, but there was a fair amount of dust buildup. It says in extreme circumstances, use a brush to clean the area, but I don't see what brushing it could have done. Vacuum worked a lot better for me.

edit: Plus, some of that insulation came loose. I'm lucky it wasn't stuck in the fan blade or resisting the condenser air flow.

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ALL refrigerators should be vacuumed out underneath at least once a year. All the heat removed from the inside of the unit is discharged here. If the heat doesn't get discharged the compressor needs to run longer.... costing more to cool the appliance.

There isn't much technology under the fridge. I can't really see your pictures so it's hard to comment. Basically the fan needs to blow over/thru the condensor coils and usually across the compressor. Removing as much heat as possible will reduce operating costs.