Saving Fresh PTs

I just began studying for the January 2027 LSAT, and I am confused on how to balance drilling with spoiling otherwise fresh PTs.

I am currently going through Dragon Test Prep Consulting LR/RC perfection books and with a full length PT every week. While I understand that there is an obvious benefit to drilling specific question types, and want to supplement my reading of these books with said drilling, I am confused as to how to go about making sure I don't burn through a ton of Q's that would otherwise be fresh on a PT. I feel like full-length PTs will be the most effective way to truly prepare for the LSAT, and want to have a good gauge of where I truly am, which I feel like would be hard if I am taking PTs with Q's I've already seen.

What should I do? Only drill with Q's I've already seem? Dedicate a couple of tests to be for drilling only? Just go willy nilly and drill my heart out? Open to any suggestions