CFR 14 FAR 61.199 says you are going to have to take a practical test, and will have to take it in a complex aircraft per 61.183 (h), which reads "an aircraft that is representative of the category and class of aircraft for the aircraft rating sought". You intend to teach commercial students by implication of renewing the certificate even if you do not use it for that specifically. Commercial students of course require complex aircraft. On the bright side, you do not have to do most of the other stuff initial applicants do.