Drt up gear kit problem

tried to fit this part DRT16020200 on a vnl 1 input shaft ,  it does not fit at all like it says in the part description

firstly , the large drive gear will not fit over the input shaft assembly  the six large teeth that  locate the springs are too deep

second  ,  the six large teeth are shorter in length , if this part assembled on the input shaft assembly there would be about 5 mm of play before the gear was in contact with the compression springs

third , the diameter of the compression springs are too large to fit between the drive gear and  the input shaft assembly

a bit disappointed to say the least , does anyone have any suggestions