why not just flip the psu back right side up before u hack out the case ?
it will work better that way too and you dont have to worry about tonne sof dust getting in the psu or anythng you may drop putting things in the case aka nust or screws while mounting things !
looking ace otherwise , particaulryl looking forward to the side view of the rads as i want to turn one or both of mine like that but im scared of how the vent amy end up