DIY Alignment Turn Plates

You can buy lazy Susan style bearings online that have a 1000 lb rating...pretty cheap


https://www.amazon.com/Capacity-Bearing-Turntable-Bearings-VXB/dp/B0045DV04I/ref=asc_df_B0045DV04I/?tag=bingshoppinga-20&linkCode=df0&hvadid={creative}&hvpos={adposition}&hvnetw=o&hvrand={random}&hvpone=&hvptwo=&hvqmt=e&hvdev=c&hvdvcmdl={devicemodel}&hvlocint=&hvlocphy=&hvtargid=pla-4583657821826655&psc=1

Even cheaper...

Hardware Turntables Lazy Susans Online