Main jet ring

The other day i was fking about with my new blaster hours hours trying to set up the carb, would rev up great but would stay at high revs and wouldnt drop, turned out the little ring washer thing was missing, put it in from my other carb.. and hey presto, runs a treat
 
I am kind of having the same problem, ill have to try to get one n see if that fixes it. Guess this is what I get for buying someone else's headache lol
 
Haha yeah, as soon as you put one in i can almost garuntee it will run good, aslong as their isnt anything major wrong with it lol