dear rubraiz bhai i have been following your post for quite sometime. i had a query for you since you are an engineer so i believe you can answer better. i work in Pakistan Petroleum Limited there we have rota system 20 days on, 10 days off. during our 20 days on field our routine is quite hectic and one can rarely find 2-3 hours for study. all i have are basically the 10 days when i can study for css. is it enough ??