Here is more useful photo showing the horrors of the construction. Siderods are HO PC sleeper material ( would have used code 125 bullhead if available). They are mounted on tinplate epoxied to the wheel boss with 14BA nuts and bolts soldered on for crankpins.
The siderods have no function and are a sloppy fit; principally because both axles are driven by sloppy gear trains .
It wont compete with the smoothness and quietness of the usual Mashima and 40:1 worm gear drive but it has proved to me that it is possible to obtain a working O gauge locomotive at little expense if a suitable 16.5mm gauge toy market mech is on hand.
Yeah, I know the comment is about 8 years too late, but I found your use of the OO mech AS IS, and adding the O scale wheels to be quite innovative, and a gem of an idea. Thanks
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