These are the steps for transforming one up two up(4,4)(4,0) into 'synchronous 441':

(4,4)(4,0)(4,4)(4,0) 

(4,4)(0x,4x)(4,4)(4,0)
by the handedness rule.

(4,4)(0x,4x)(4,4)(4,0) 

(4,4)(0x,4)(4,4)(4,0x)
by the two up two down rule.

This pattern contains the throw 0x, as does the next one!