Thanks everyone for the contrbutions it looks like I will be busy this week.
Iwill check the linkages of the ailerons (maybe increase diamater as i am not sure i am using 4-40)
About the surfaces balancing , this the first time I hear about it, although the pictures are explicaive, is there any good matwrial to read abount it so I understand the process and also what should I buy for doing it?
Thanks again averyone
Omar