Drilling Cambridge packets by type and PTs - overlapping conflict?

[JCDante]

I'm going to follow Pithypike's Guide and have just bought all the materials (except Kaplan since it's not available). How does one suggest planning out the self-study process so that Cambridge packets by type and regular PTs don't conflict with each other? I'd assume I'd recognize some of the questions between the two - thus skewing my PT results.

[LawsRUs]

My recommendation is drilling PTs 1-40 then saving the rest for when you take them under timed simulations. GL