Ikea Bror Shelf Extender

I have made a extended storage shelf for filament spools as the current shelf is unit is 147mm between 2 shelves. The height is 20mm, can store most common filament spools size without box. It can store other H2S accessories.My lower shelf is 1 HT and 1 AMS 2 pro. Need to align 4 shelf supports to the slot before pushing down.