The TP16 tonearm was an upgrade from the MK1 to the MK2. I have a TP16 on my TD160 and it’s just OK, nothing to rave about but it’s functional. Mission tonearms as well as the SME tonearms were popular upgrades. The vintage Thorens tables are a project. If that’s your friends aim, to improve on an old Thorens, then have fun and in the end, it’ll be worth it. Otherwise, how about a Rega? Rega’s aren’t built like a VPI but they sound very good given there price point.