RE: How to make flaps deploy slowly on JR 9303?
IMHO the 9303 is a high end radio. It has a very nice servo speed adjust function where each servo can have a separate speed in each direction that is Flight Mode or switch selectable.
To adjust servo speed, simply highlight and select SRV. Speed in the FUNCTION List.
The servo speed can be adjusted from 0.176 seconds/60 degrees (very fast if the servo is normally this fast or faster) up to a maximum value of 15 seconds /60 degrees of travel (very slow).