There is no doubt that a .46la is going to have a lot less power than a .46 ax, but unless you plan on putting that engine in your second plane then there is no reason to spend the extra money for power that you probably won't need.

Linked below I have the fuel dot filling system and the dubro kwik fill valve that also serves the same purpose. Most people find the fuel dot system easier to use.

Fuel dots
http://www3.towerhobbies.com/cgi-bin...?&I=LXAHE1&P=7

Kwik fill
http://www3.towerhobbies.com/cgi-bin...&I=LXD745&P=ML

Austin