IKEA LACK Hack, making an "L" shaped shelf

The price point of the IKEA LACK floating shelves is unbeatable... But sometimes you just need or want it a little different. Time for an IKEA-hack.
I knew the basic outcome that I wanted and had done enough IKEA surgeries to know what to expect, so here is me making it up as I go on this LACK Hack.
Links to the merch that I am wearing and all my social networks can be found at byronbuilds.com

nice hack!!

[@ByronBuildsOfficial]

Thanks.

[@timbrandon1466]

Great video. Shelves look awesome.

[@ByronBuildsOfficial]

Thanks!

[@tigurr]

Nice job! You make it look so easy!

[@ByronBuildsOfficial]

Thanks.

[@magalygouveia]

The screws that fix the shelves should be looking up.

[@ByronBuildsOfficial]

They are.

[@angelheartshp]

Great video! What were the dimensions of the shelves after the hack?

[@sonyv.m4421]

Sir iam from india kerala. Which meterial used company in shelf side. Three sides. Which meterial used bracket. You know pls give me answer. This type shelf not available in kerala. So i think this type shelf making and sell market. I dont know fluvent english any mistake in typing. Sorry

[@ByronBuildsOfficial]

This is from ikea I do not know what the specific materials are.