Welcome to the site Yaj!
Not so fast with the el-cheapo JCW XL. I've had mine mounted now for 5 years and can say it is lightweight, spacious and completely waterproof. If you don't need a designer label box this is the one.
Very nice job on the additional brake lights (led strips) and the SAE charge plug. You might want to consider rewiring one strip to your running lights, at night it will help to define your profile for nighttime riding.
One another usefull farkle: get yourself a 12volt power port and wire it to another SAE plug you will be able to charge your cell phone in the storage bin while riding. I also use my powerplug to recharge my bluetooth intercom unit when its been on all day.