Re: flowable silicone 5 stars
Sure you can put flowable silicone in it.
The first 5* release came stock that way.
The grooves are .04" deep, and work well for sili, and pads.
If you have worn through the one drop pads, I would say...
Replace one side with a smooth gen-pad, and one side a thick onedrop.
That set-up will last months, as the gen-pads dont wear.