Potato Fork

So I've always dug up my spuds with a 5 pronged fork, and I always end up stabbing at least a dozen spuds in the process which I can't then put in sand and save for later in the year. I've been looking for historical potato forks to see how they used to do it in the past to avoid stabbing the precious cargo. I wondered if there was a way of attaching round balls like ping pong balls to the end of the fork to see if that would stop the waste.

Any ideas?