Alright, I have finished a process for making a heavy duty 2:1 PCIe adapter for Neptune owners. It is made with 16AWG wires and minifit HCS (high current system) pins capable of 13A. It is tricky to make with crimping two 16 gauge wires together but I soldered the pins to the wires after crimping for best contact. I cannot guarantee that the nylon housings at the pcb won't melt so be sure there is some airflow there.
Here she is:

Pricing is $8 each with discounts for larger orders. Shipping will be priority mail with tracking which is $6 for US and $24 for international.
Please PM if you are interested. Thanks
Another solution (but a lot more DIY work):

if anyone is interested, I have plates that replace the mounting apparatus they used. It will get the foam out of the way of the VRMs and allow more airflow over the PCB.

They'll come with the plates, screws, nuts and spacers for all 5 ASICs - .0675 BTC plus shipping (USPS Priority/Priority Express, your choice)
PM me ...
Ski