About four or five years ago I made a metal clunk tank because my tank compartment needed a custom tank and inflow was not doing it for me.
I noticed that some folks route the pressure vent to the inboard side of the tank about a third of the way rearward ( about like I do on RC ships) ,so I set mine up that way . I loved it and converted all my ships (ST60,ST46, OS FP, Fox 35 ) to that style tank and have been happy with the runs on all of them.
Now- a -days I fly mostly electric but the few classic and old time planes I still have with IC engines are set up with metal clunks
Dick