hello,
is it helpfull to place heatsinks on the mainbord?
reprap.me/heatsink.html
It doesn’t harm and it can help when the weather is hot.
I placed them on my mainboard and the stepperdrivers are now very cool 
I don’t have a modified fan mount for the mainboard that’s why I went for the heatsinks.
Cheers,
Dylan
ordered some with the printer, glued it to the steppers and I have no heat props