Serfas Thunderbolt Bike tail light Saddlebag Mount

I really like the Serfas Thunderbolt Bike tail light*, but when I mount it on my saddle post, there are 2 problems:
1) the angle is poor, pointing slightly downward
2) my saddle bag / toolkit blocks the view of the light

*This thing:
https://www.rei.com/product/852297/serfas-thunderbolt-usb-rear-bike-light


I've included the design files (123D Design) in case you want to make changes.