DIY Kitchen Cabinets (Newbie)

[Kris L.]

Just bought a new primary residence. Kitchen had unused space so I decided to add some kitchen cabinets. Needed to match the other side of the kitchen, so used one of the Lowe’s options (Diamond Arcadia I think it was called).

My one question is, do I remove the shims on the base cabinets after they are secured to the wall, or should they remain a permanent fixture? Floor wasn’t quite level, so the front of all base cabinets has about 3/8” gap.

Would post photos, but not sure how to do it within the app. May have to get on my laptop later to update.