Front fork spring, and other upgrades for RC5+?

[cerebrix]

Now that my warranty is over in days here (extended warranty didn't exist when I bought my bike obviously). So looking at potential upgrades.
Is anyone aware of a heavier front fork spring I could throw in there since the stock spring is so light?
best dual battery box?

Not currently considering 35A until someone makes one that can deal with the premium headlight. I like that thing too much to get rid of it.

thanks in advance