gazzazh:

I believe that advice of your instructor is not as good as it should be.

If your model of reference is this one:

http://www.airborne-models.com/html/...p?ProductID=46

Note the Key Feature that reads: "Perfect for beginners who have graduated from shoulder wing trainer"

Have you graduated from a regular high or shoulder wing trainer?

If not, following this link, you will find better options:

http://www.rcuniverse.com/forum/m_4537845/tm.htm

Regards!