When my bike was restored to a Cafe Racer, one of the critical features I wanted was a centrally mounted oil tank, underseat battery, and no sidecovers.
The original solution (sideways mounted stock tank) was a bit crude and brought with it several issues. After much subsequent rework on the bike, the original mounting arrangement was brought back, along with some ratty sidecovers. Although more serviceable, it strayed from my vision of the bike.
While looking for the end of the internet on my latest military deployment, I came across the good looking pieces that Norton Race Parts puts out. They have rather recently (I think) added a centrally mounted alloy tank to their lineup. When I came back from the Middle East in October, I decided to take advantage of the post-Brexit-vote collapsed GBP, and put myself in the queue. Several months later, it's now here.
The craftsmanship is impressive; this tank is beautiful. I'll be fitting it this weekend and post results from that. There is no drain plug, although one can be fitted if desired. I use Iron John's inline oil drain/ignition interlock valve, which makes draining the tank a simple task anyways (remove the line at the far end, open the valve, and you're off). Payment options for NRP were Paypal with a service fee or international wire transfer... Communications were very prompt. This tank is NRP 1007P and I ordered the fitting kit NRP 1008K along with it.