Wrong way to make it up at last, you guys need to point the pin on the plug to align the fluid port before screw the lower sub in , rather than hammer and pipe wrench to force it.
The aim is splendid but HSE's ethic in finalising the aim was no where to be found...P.S nice 1 guys for the modification...would love 2 know how to efficiently back out the plug and replace it with a valve