Playing fine presses with an unknown cart

Well i'm still researching and waiting to purchase my new TT. In the meantime I have purchased some expensive quality pressings. My old Technics has never really been maintained or upkept. Being new to the anolog scene, I am shall we say rather excited to play my new purchases. My question is; Can I damage the new vinyl with my old cart? Is there anything I could do to "revamp" the cart while I wait for my new TT? Last but not least, do I just wait out the few weeks for my new TT and preamp or will I be able to hear a big difference with my old set up since these are quality albums? Thanks, Brian