Help me improve my rack!

[fretfingers]

Just started building my HexOS server/nas over the holidays. What do you guys think?
How can I fit that 2 RU battery backup in there? It's an AV rack with wife approval. 

Should I add rails?
Remove shelves?
Remove the shelves and just stack em? haha

I'm storing my personal and professional audio and video project files here for long term storage and backup. I often need to access and reuse old projects. So I'm accessing this server from work too. The 3Gbps Internet here rocks!  I've also got a media server here too.

- Dell Precision 5810 (Running HexOS)
- Bell Modem
- 5 Port 10G Switch
- 24 Port 1G Switch
- Mediasonic eSata 4-Drive Bay (16TB HexOS HDD Pool)
- 24TB Backup Drive (with snapshots)
- Livingroom Gaming PC
- Dust

Thanks!