A) knock out the tailwheel endorsement in something. It's a lot of fun and is a great refresher on stick and rudder skills.

B) You can log all the PIC you want, you have the appropriate category and class, tailwheel endorsement is no different from HP or complex, you can log, you just can't act. Provided the "acting" PIC, in this case the instructor, is tailwheel and AMES certificated and current, you can log all the PIC you are actually flying.