I wanted to display my Lugia card in a Kamizone extended art display, but my card was graded under SGC and they only offer PSA and CGC displays. I ordered the PSA one and to no surprise, it didn't fit. So, I designed my own slab insert that fits SGC slabs. Due to how the screws are positoned and the size of the slabs, the card doesn't sit perfectly centered but it's close enough. 

I know this is very niche, but I figured one other person out there might be in the same boat as me. So, I wanted to upload this in case anyone else needed it like I did.