Yea if they are good there great but the ones that don't seal around the tank lid where the O-ring is I've tried all kinds of different O-rings and they never seem to seal right........replace the tank and there good to go. I've replaced 3 tanks and O-rings on 3 or 4 more........presure leaks causing lean problems..........never had any problems on a 1/8 but I love the Redcat 1/10's