Adapters great but don't fit ATX
So, what I really wanted was another original HeadBlade Sport. (I have had two already and I love them!) Unfortunately, you no longer sell them. So, I opted for the ATX with the 4 blade head. That was too cumbersome and hard to use in areas around my ears. I purchased the HB2 adaptors hoping I could use them on the ATX but they won't stay on and disconnect with even the smallest amount of pressure. BTW, I have read some reviews and there are others out there like me who still like the two blade options.