IMHO, once we decide to over write OEM stuff of our rides (which the manufacturers' engrg & design spent years designing and planning) and modify with aftermarket pdts ...be prepared.
Most of us did it cus of "hearsay n butt feel" . While some mods have been proven for the better, some do have problems developing over time. As with all items, some unluckily will happen to be the owner of a problematic piece which other can't identify with...that's life.
My cross currently has a "BIRD" residing in it and it happily goes chirping away whenever I go over humps..Tis is the first, I believe, for Guys @ BVO and look like i got to down the front set to locate the "NEST" while fellow bros on CROSS are still happily humping away in comfort.
So be it whatever the brand..the more important question is, what is it u are after ?
Cheers