I have used Lovan Classic 1 and 2, many years ago. The top shelves were very tipsy being a tripod design, which did not change with new tops of any kind. I am a woodworker and tried oak, walnut, plys of many kinds, bdr shelves and in the end all were still sitting on a ringing metal stand. Its like a body builder if you put muscle on a weak frame it helps but does not match muscle and a large frame. If you look at many of the stands sold on this site they are 3 inch maple shelves with weak frames or no frames at all. That is why they need to use such thick maple, due to a bad frame. Out of all the wood I have tried in my 40 years in this hobby, and I have tried more than listed, the only wood that sounded better musically was maple. Is it he hardness of maple that makes it sound better, I think not because oak, cherry, teak etc. are hard woods but sound bad. Why?
Since money is tight and you are going to keep those frames,(your choice, I sold mine) I would go the route of many on this site and try a very thick slab of maple on a bad frame.