I have 3 differnet brands of offset pads.
The blue lug is the best. But the upper part of the pad holder can hit the tire. Some right away and others when the pad wears down.
I ground off the offending portions of the other two.
I also went in search of thick brake pad. I ended up cutting a pad to fit the slot. Not a perfect solution. I keep an eye one it.
If anyone has a lead on extra thick brake pads which fit the slot on these, please posts.