Kershaw Heavy Duty Slipper Springs - Opinions?
 

Has anyone here used the Kershaw Designs heavy duty slipper springs? They claim to allow up to 220lb of force when locked down all the way. I've read about some people having issues with the stock slipper slipping too much even when fully tightened. Can anyone comment on the effectiveness of this upgrade?

the stock slipper has always worked well for me with a 1515 2.5d on 5cell