Hi, you could use the CAHAI http://www.cahai.ca/. It comprises bimanual tasks. For the paitients own experience of difficulties the ABILHAND questioonnaire http://www.rehab-scales.org/abilhand.html

Regards

Iris

We evaluated the Michigan Hand Outcome Questionnaire, which is a Patient Reported Outcome Measure. Is gives detailed information about the patient's impression of strength, sensibility, daily function, pain, satisfaction, work. For both hands as well as for left / right separately.

http://mhq.lab.medicine.umich.edu/

The Purdue Hand Function Test evaluates hand function in unilateral and bilateral conditions and may inform left-right differennce in addition to bimanual cootdination. Movement kinematics that involve tasks of bilateral upper-limb reaching may provide more precise information on the control strategy when the experimental task demands for inter-limb coupling. 

Minnesota  Manual Dexterity test    and FMA-  IX component