RE: Servos' Little Something Extra.
On my Norvel .074 powered Lil Extra I have HS45s for the ailerons and HS55's for everything else. Originally the ailerons had HS55's but the pots starting going bad. The HS45's have a beefier geartrain but only slightly lower torque than the 55's. So far lots of flights with this combo with no problems.