Hiho, It's well documented that the best designs of Lenco plinths (check Lenco forums, various audio forums all over the web) usually call for super high mass plinths which use certain materials (like various plywoods and other materials). This is why the nantais and artisan Lenco's plinths are so huge.
Btw, if you think the Artisan tables are ugly because they have glossy acrylic clear coats, auto grade finishes and are well polished, then what in the world IS good looking to you? A jank rough unfinished wood plinth having jagged edges and splinters?? Geesh...
You must own a top of the line Rockport or Goldmund Reference 2 to have fit and finish standards so high.