Tonearm transplant on a Dual 502 turntable

This Dual 502 (which started out as two 502s) with a tragic flaw needed some serious help in the form of a replacement tonearm from a different Dual turntable. (Correction: it's from a Dual 1245 belt drive, not idler drive model.) 0:00 Evaluating TWO turntables 1:30 The search for a tonearm 5:17 Fabricating a mount & fitting the new tonearm 11:26 Tonearm troubleshooting 13:55 Servicing the motor and pulley, speed testing 19:01 Why the RCA jacks are broken 21:06 Testing 22:10 Cartridge and tonearm alignment and setup 26:04 Diagnosing motor noise 28:00 Which base? and conclusion