YOU SAID:

i'm takin this horse by the reins makin redcoats redder with bloodstains

INTO JAPANESE

私はこの馬を手綱でターキンしている

BACK INTO ENGLISH

I'm takining this horse with reins

INTO JAPANESE

私はこの馬を手綱でいじっています

BACK INTO ENGLISH

I'm tinkering with this horse with reins

INTO JAPANESE

私は手綱でこの馬をいじくり回しています

BACK INTO ENGLISH

I'm tinkering with this horse with reins