Hmm I hadn’t realised that I’d have this same issue with every bit of code that I wanted to download 
As it took me about 30 attempts the first time it means it just not viable currently for me.
My issue is not the power availability - it’s the robustness of the download protocol in busy networks. I understand there’s a fix coming for that too. My core will be receiving a lot of interspersed UDP broadcast packets too due to some devices on the network. When this fix is incorporated in the new firmware can you post and let me know and I’ll dig my core back out of the box.
K