You should mention that the same physical EHD can be used on the Wally, but any events recorded will be lost when the EHD is reformatted for Wally use.Wallys don't have DVR's and your EHD can be transferred from the 211's to the Wallys
It will be interesting to see if the other ViP 211k at our vacation home loses its EHD recordings when we fire it back up this summer. I knew we should have bought the Wally instead of the 211k last year…