I think it would be interesting to mess around with different scents. Adding something like smelly jelly or a more liquid scent to the pellets. Go half/half with the pellets in the base of the scenter and additional scents above the pellets. That way the added scents would seep down through the pellets and create a larger scent cloud.
I have the scenters and have noticed more hookups for Blackmouth. I haven't messed with them that much this summer yet, but plan to once the ankle heels from surgery (ruptured Achillies tendon).

Kev