I had all paper logbooks. They are very neat and any errors I made were marked out with a simple black line instead of white out. I have everything backed up on Excel on my laptop, but that's only incase anything ever happens to the paper logbooks. I just like the old school way of writing it in. I'm sure as long as you can show the transition from one to the other, or have it all in one form its not a problem. I still got the job, so the old school way wasn't an issue.