@kimbo posted his subtank rba base fix, just drill some holes in the side to make it like the latest version of the rba base. I was also going to suggest spending 40 bucks and ordering a new rba head from fasttech but since last night they've sold out.
Thanks @ET Seeing that I have already dremelled the juice channels, I am worried about flooding if I follow @kimbo 's method now.
I need to find some stock RBA heads to try his method, so I have to just wait till local vendors get stock.