I just inherited a B&O Beogram RX2, it is in full working order, and has a MMC3 stylus. I was wondering, seeing as it dates back to 1986, how would I know if the belt needs replacing? It had been barely used, and then stored in an attic for years, and to be fair I was suprised it worked at all, but after a bit of use it exhibits no signs of trouble at all. There seems to be no issue with playback at either speed. Can I assume all is well or is there anything I can check?