Had a couple questions and any help would be appreciated. I have the Progressive springs on my bike now but the front end still sags a good bit. was thinking about getting either the HighLifter front Lift Springs OR the Lift Springs from EPI. does anyone have any idea which is truly better, stiffer, stronger??? And can you still use the "collar" that the progressives came with, with any of these Lift Springs? Any one else running H/L or EPI Lift Spring. Thanks Alot for the Information.