I'm new to the forum; I've been looking all over for a good answer to this question: protegetech.com recommends purchasing a set of MP3/MSP bump stops when installing lowering springs on an MP5. I'll be putting in a set of Progress springs (1.5" all around) on my MP5, and want to know if I should buy those stops, trim the existing stops, or leave them alone altogether. Appreciate any feedback. I promise I'll post some pics afterward... doesn't seem like anyone's ever posted pics of a Progress-lowered MP5.