Hello everyone , i am after a little information .When its says EVO on the zziplex rod i think it means they are 20% stiffer ? But does this mean the full rod or just the tip .Also the M4 range of tips ,will the tips fit the standard M4 butt as i have a M4 and i was wondering if a m427 tip would fit it or a M4 evo fit a standard M4 butt .Thanks in advance lads for any information as its very much appreciated .