If it's too long don't worry about it
Selden in
Gibraltar made mine too short so we had to redo everything including the new roller .
If you provide more information about your mast type and spreaders people here will be able to help you .
A wild guess for me , take a weight and put it on the
mainsail halyard , the mast must be lean backwards about 10 percent and should be bent backwards up to 20 percent of the total length.
Check if the mast is bent forward , if it's not then the
chain plate should be longer or the wire , so remove it cut in the right size and try again , try to not over cut it .
Do you have photos of the broken chainplate??? I always wonder how the manage to brake
.... I am in
canaries if you arive here and you need help send me a.pm .