Lotus recalled some early 05 cars because the shifters were breaking. They replaced them with new ones that have a different thread size for the shift knob. So some early 05 cars that didnt have the recall work done have different thread patterns than the rest of the cars.
do you have the one thats half aluminum haf leather?
i got such and experienced the same problem so i just put the appropriate number of thin copper washers to bring it to the correct height in order for reverse to engage properly.