Sometimes jap pipe ends do not have the small unthreaded portion at the end of the fitting so the normal 10x1 mm will not seat properly and some have OP 2 concave on the pipe just to confuse the issue a little more
Cost : Little as possible.
Thanks : To those who by their generosity my build has progressed.
Its a handmade sports car not a flaming kit car !!!
If at first you dont succeed,avoid skydiving...
No parachute require to freefall,only if you want to do it twice.