Very happy to finally have finished my storage system/sleeping platform and wanted to share it. Ended up being more challenging then I thought, but was definitely a rewarding experience. I spent weeks looking up other people’s designs and ultimately decided to do a system somewhat similar to driftas. 1/2” Baltic birch, UHMW slides. For the bed extension, I used hangar bolts in rounded wood poles (used 1.5” closet pole), inserted into tee nuts. This makes them easily removable for storage. The larger extension seems sturdy enough but I may add one more leg in the middle just to have more support. Bed extensions are secured via L braces that slot into a wooden bracket I attached to the back of the drawer box. Rear seats remain functional, and can be used independently, though I opted to leave the left ones out to gain much more storage underneath. Total top platform length is 72.5”. Purposely made it this length so I can with the bed setup and have the drivers seat fully pushed back, though you definitely could make it considerably longer if leaving the bed setup when driving isn’t important to you. Overall very happy with how it came out.