They told me to grind. And sent me free spools. I took about 1/8" of material off the spot where it has to slip in there and I was able to get it in and installed. so far so good. She's still not quite flat foot but much better.So what did you end up doing? I'd still like to know if another option aside from T-rex, Grom shock and the spring hat are options to lower the R3. Still hoping a vendor here will come up with something better.