you have a couple of options....
Use a deburring tool and/or a dremel type device and widen up those holes on the ezcloner. Then put in your netpots. Word of advice, and i know you arent a dummy. BUT most netpot without lips normally it is a good idea to use a 1 7/8" holesaw instead of 2" because you always wanna take off 1/8" when drilling so just incase you dont have a lip on your netpot you will have support. However me and you use the same netpots. and yes i can tell.
they have good lips...however on my cloner i built, i still drilled 1 7/8" holes.