There are two types of rockers, it looks like you have the older ones used from the late 30's and 40's. The newer ones [late 40's -50's are angled.. I have some of those loose [both types] . I would post a photo for you, but I can't find them.
I have always liked the look of the Monark double spring fork, but basically it was junk. They look great but as far as riding them, there are problems. Iv'e had a whole bunch of them and they go out of wack real easy. Monark used mild steel in the construction of their forks and did not heat treat it. The steering tube is weak and easily bends. The forks are weak and easily bend. The springs tend to twist as the two rods that hold them get , as you say, "Tweaked easily."
These forks looked good, but because of problems Monark company bought a Schwinn springer bicycle in 1952. They mounted the Schwinn stationary at waist height on moving, offset rollers and observed exactly how the Schwinn fork worked.
In 1953 they came out with their version of a better fork, which was a copy of Schwinn's design. Schwinn threatened to sue Monark and they had to discontinue their new fork.