the only thing tricky is after omega springs are removed,you have to get the axis bar out,& its a little tricky getting back in,i did it a few months ago, i think it was tricky getting the bar back in with both left & right liners together.also, the torx heads for the rear top of the handles are very fine,one that went in didnt "feel" good when it was screwing back in,so care has to be taken on the smaller torx screws,especially when loosening or tightening.dont want to strip them out.when it was all done,it almost seemed like a whole new knife.too bad bm didnt issue it polished or satin as standard. the black finish scratches so easily.thought about doing it to my presidio,too.........