I've downloaded the latest image that was posted here http://loadbalancing.modaco.com/download.php?file=hudl2_ota_rel.android-build.20150803.092218_to_rel.android-build.20150917.142239.zip and the idea is to learn a bit about how the update is put together and to see if it is possible to modify it.
I don't know very much about Android but I have reasonable experience with Linux, so hopefully the learning curve won't be too bad.
Step 1. The package is unzipped and explored.
Step 2. Try to mount the boot.img
quad hudl2# simg2img boot.img boot.raw
Invalid sparse file format at header magi
Failed to read sparse file
As you can see failure at the first attempt.
What I hope will happen is that a few people will chip in and we will be able to get some progress made, and at the very least we will all learn something.
Any ideas?
samac