yes sorry my last post here didnt go thru yesterday. Just round them off a little and then balance.
qwick .... you have seen this supertiger engine thats set up for air boats and has a muffler set up for air boats also.
http://www3.towerhobbies.com/cgi-bin...?&I=LXZUH4&P=0
http://www3.towerhobbies.com/cgi-bin...?&I=LXZUG8&P=V