The 100hr check is required only if you are going to do flight training (of other people) in your plane, or carry paying passengers. It is not required for rental alone, contrary what a lot of people say. Reference FAR 91.409:
http://www.airweb.faa.gov/Regulatory...%20maintenance
The 50hr checks are not legally required, same as they aren't legally required in a G-reg on the private CofA regime, but in practice you still have to do the manufacturer's recommended maintenance, which is typically 50hr checks... but the pilot can (in general) do them (like on the G-reg).