Well I recent just purchased 2 used edguns from here, a lelya 2 and a leshiy classic. Been shooting them a lot today and was ready to sell them both, could not get them to group less than an inch at 35yds, cleaned the barrels and still the same, then I decide to run them both over the chronny, found the problem, the leshiy was only shooting 750fps and the lelya only at 790-795ish, tuned them up to 890fps shooting jsb 18.13g and now they are laser beam same hole shooters. I assumed that the prior owners already had them set up to shoot good.. lesson learned 
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