alchi_lagyo, you can use CPT unlimited and won't hurt u a bit in OPT if use it part-time, i.e. less than forty hours week. You can't work more than forty hours during school anyway [legally] as an international student in any form. So, even if you start CPT from now, and work full-time during summer you will not go more than so called 11 mths and 29 days bar and still can get OPT authorised.

Drawback for CPT: not all univ/college offer this. Every institute has its own process and rules and reg. Univ where I finished my undergrad "no" CPT but whoever applied for hardship EAD, 99% approved.

Bottom line: use google and do research and talk to school DSO, US immigration is harder to understand than women, u always think u know it but u never know. good luck