Crab Distributor Timing Plate Confusion

[aussie merc]

i fitted one to a crab and what a mission the fit and finish was not good took about 12 hours of hand fitting to get it right the plate didnt even fit into the body to start with and it loaded right up when the circlip was installed seems ok now but for something thats marketed as plug and play its far from it about the only thing they got correct out of the box was the air gap might pay to take another look at yours