question about slick-gate shifter

I bought the Hills engineering gate because I hoped it would help me shift a bit more effortlessly(once gear oil wams up!) and because the stop to keep from going into reverse had worn away. I like the product but I've noticed a few times I've done a bit of gear grinding when downshifting, I think because of less restriction of the stick position. Has anyone else had this occur? I could not make this happen with the original one.

Jeff