What I ordered:
Floor flanges: Z10-4075BLY60mm (9.875 diameter, $45.99 ea)
Table flanges: Z10-4067BLY60mm (7 diameter, $25.99 ea)
Columns: Z60-7279VEL27.5-2 (27.5 long 60mm diameter, $38.20 ea). The 27.5 columns were a special order item but 26 columns (Z60-8266VEL26-2) are usually in stock. The total height of my columns with the bases is 28.75 which is 0.5 higher than the stock ones at 28.25. If one were to use 26 columns, the table would be 1 lower than stock. The first picture shows the new and old columns and bases side by side.
I ordered the bases from Pier Supply http://piersupply.com/Seating
and the columns from Jamestown Distributors http://www.jamestowndistributors.com
I weighed the old columns with flanges and each one weighed 1214g (2 lb 10.8 oz). I weighed the new columns with flanges and each one weighed 2166g (4 lb 12.4 oz). The total weight gain for this project is therefore 1904g = 4 lb 3.2 oz = 4 Warsteiner beer.
I removed the floor flanges, shaved down ridges where the flooring had been raised by the screws, and filled the old holes with Quickwood Epoxy Putty from Lee Valley http://www.leevalley.com/en/wood/pag...at=1,190,42997
but I have also seen it in Home Depot and the like. The end result looks good enough considering that most of them will be covered and will keep any water on the floor from going into the old holes and rotting the plywood floor. The filled holes are shown in the second picture.