No he was brilliant, it worked better than they dreamed.
The war just ended before they could deploy the bats.
But that was nothing, The Navy Frogmen off the straights of Gebraltar used porposes with syringes connected to CO2 cartridges mounted to their snouts to inflate Nazi Frogmen planting bombs on ships. You never hear about that anymore, that program was the origin of scuba.
The porpose have a natural tendancy to nose humans, so the training was easy. And it made it easy to identify kills.
That was interesting and never knew about it, would have been one heck of a deadly weapon if they got it fully working. Though its wrong to use bats in such a way and easily could have backfired if they went some place that belong to allies.