I also do a few modifications before spring of each year, then enjoy the car until it gets cold.
Here is the changes for this year:
GT3 Console Delete with a Double Din radio. I did not have the option of moving the climate controls above the radio, so I took them apart and cut into the new carpeting. I have to reach a bit, but I hardly ever change the controls. It is either on full blast or off. The console gives me SO much more leg room. I should have done it years ago.
The wonderful Projector Lights. LED fogs and turn signal bulbs with an electronic flasher to avoid hyper flash. These lights are so ridiculously bright and awesome that words cannot describe. Even my Audi is jealous of the lights! I highly recommend them to everyone. Mine are black except for the front which is gunmetal with the Angel eyes.