Just got back from Fordboy's fabled farmhouse, home of the free range Cosmo - it's not a drink - I'll let Mark explain. Seems the ultrafancy titanium spring keepers have a steeper step to the internal spring, and provide too much seat and over-the-nose pressure to make sense. It's no big deal - we had success with the steel pieces last year, so that's how we're setting it up.
Seems like the shinier they are, the less functional pieces become.
Guitars are the same way. Greg Kurchewski out in Virginia is a guitar broker I used to work for. He sees a lot of guitars come through his shop, many with non-standard pickups, or trick bridges, "upgraded" tuners - all that type of thing. Sometimes the improvements are warranted, but his pat answer is this -
"Stock is Rock".
In this case, with the Grenade, I agree.