I have never used a TC3500 but have used many other Hunter machines including their Revolution and multiple alignment/balance and brake machines. Everything in our shop is Hunter. All are quality pieces made in the USA and backed by Hunter. Look at their website for support. Contact them to see if parts/accessories are available locally to you(likely yes). Industry leader for sure!

Look around here for videos that might help: https://www.youtube.com/channel/UC-MY-nAmjswCv68JDCPsiqw