BMW K100 Project - New fuel cap and solar battery tender

For the first time I add some basic mods and upgrades to the K100 project. Even though I've still not got it through an MOT I've gone and bought some mods. The first upgrade is a quality of life solar battery trickle charger/tender bought from eBay very cheaply. The second is a new fuel cap which is a simple screw on and off job as I dislike the way the key feels when it gets put in the current file cap.