Hi there, i bought my evo, a thumbhole version in .177 about a year ago and i love it. have just purchased and fitted a cs1000 to it as a xmas present to myself. took it down the club for a shoot yesterday, and it has transformed the gun. well worth it. its fitted with a 4-16x50 mtc viper which just clears the barrel when its broken, and is very accurate out to 50 yards. i agree about the power dropping off, mine is running at about 10foot pounds at present.