Synthex-Kit v2.8: 2 Encoders and 4 Buttons possible???

hi guys,
need a hint:
do i have to decide 2 encoders or 4 buttons? or can i use both .....
thanx a lot for your answers .....
need a hint:
do i have to decide 2 encoders or 4 buttons? or can i use both .....
thanx a lot for your answers .....