I posted an idea here:https://bitcointalk.org/index.php?topic=482352.msg6222366#msg6222366 to resolve the shoddy work on the heatsink/pcb design in regard to it not making contact with all 5 GC3355 chips due to two components that are taller.

It's easy (if you have a steady hand) and takes about 5 minutes...afterwards you have perfect contact to all 5 GC3355 chips.