We have the command to reset the values. Do we have a way to set a certain value by a command?

I feel that the handcraft grows too fast by default. I already changed the rate in the settings but I'd like to drop the value accumulated by now to 0.60x.

There's no way atm, but i'll think of adding it once i have some spare time. I tried already as soon as i read this, but i encountered some problems.
For now, sadly, all you can do is to reset them all to 0 and grow back up at the new rate.

PS: I totally agree that it grows too fast. I kinda stopped playing Factorio again around the time i created this mod, so as much as i'm perfectly fine with trying my best to make it not crash, balancing it would just require more time that i'm willing to spend. :(

I can do the balancing since you have provided a way to do so easily.
And, if we get to change the value ourselves, that enhances the balancing for all of us even further!

Since there are many people around with many different preferences, this is one way to let everyone decide the values and their changes themselves!

Added in 1.0.6:
/PD_set bonus_name value [player]

Train rides are nice for offline work. Too bad I didn't download Factorio's 1.5GB, + 2.5GB of saved files beforehand.