Ive been training for a couple years now and have built decent mass on all areas with the exceptionof my lats , I do them once a week and i do about four or five excercises consisting of pull ups , t bar rows , deadlifs and pulldowns , Ive tries changing my grip from wide to narrow , have done more reps and tried only heavy reps , my lat spread is weak and I cant seem to make the mind muscle connection , anyone have suggestions ?