Very nice Jeff,
The original dubbing for the Waterhen Bloa isn't mole, originally it was water rat (vole), but unfortunately protected and very illegal to harvest. Similar in colour and texture but much longer in staple. With mole there isn't enough length of fibre to create the dubbing effect. The best substitute I've found is muskrat underfur. Make sure there are no guard hairs caught up in it. With care and practice you can get a body with a halo of dubbing extending to 1/4" from the hook, yet still clearly see the thread.
Cheers,
A.