Posted: Tuesday, February 13, 2018 - 04:49 AM GMT+7
NewTMD has two sets, a complete tank and hull only. For a light tank you need five 'scopes, four vision and one sight, so probably the complete tank set is needed.
I am making an M3A3 right now and tried fitting a Tasca periscope into the gunner's periscopic sight mount, but the mount opening was too large. It may be best to use the NewTMD mounts rather than the kit parts to insure the proper fit.