I have the CRKT rollock...the 1st generation...I too can easily op;en the knife one handed...and I sometiems try to cloe it with one hand too, what I do is hold the knife while dissengagign the lock, I give it a quick jerk which lets the blade slide down the track...then I grab the blade with the same hand and puch the handle against my leg or another flat surface while I close the blade...
Ok after re-readign this is just soudns like...WTF? LOL...but overall all I cna say is its not easy closign it oen handed, lol...and I often just use 2 hands to close it...but I hat doing that because on the CRKT it has a nice mirror poliched blade, and I leave a big finger print when I touch the blade, so I will often grab the blade with my shirt and close it that way leaving no prints...
Sorry, I can imaging my post didn't help youone bit, lol, now Im rambling...Anyway congrats on the knife, its a nice one!