I like shooting a Wingmaster 870 Trap but need to tame the recoil a bit. I like Kickeez products, but I would like to avoid grinding a custom pad. Anyone have experience with either a Limbsaver Airtech (not the slip on) or Falconstrike? Other options? The folks at GRACO do a great job with their Gracoil system but I need to keep the costs down on this gun.