Once we know for sure if the alignment of the inlet hole is the problem, replacing the carb body may be the easy solution. It is hard to imagine making the modifications when the body is only $8.99. Here is the link to the carb body with the needle valve in front. Tower also has the carb body for the rear mounted needle valve for $1.00 more.
http://www2.towerhobbies.com/cgi-bin...?&I=LXEGM2&P=7

Andy