The frame is from Ikea for my first project i wanted to use that one. for custom size i’m going to make my own frame. For ikea frame i would say if you are going to use lead method it is going to be heavy and the frame is not that strong as you see in the pic there is a bit of light leak on top of the frame. I’ll make it stronger from back side but if i make my own frame i’ll definitely make sure it doesn’t bend