Another key product I use in all of the turntables I build. VXB has a number of different lazy susan bearings in a variety of sizes from 4.7" diameter all the way to 39.4" diameter. The 39" unit will support 1050 lbs but has a heafty cost of $599.00. The one I purchase most often is their 450mm (17.7") unit at a more reasonable price of $ 24.95. I have not been able to find a better unit for supporting a large doll house.