That would certainly be a problem. On mine, when the leg is in it's shortest position, it is about 3" too tall. I was therefore not using the leg at all.
Check and make sure that the furthest most leaf has support under some part of it if you plan on keeping the factory supports. Mine had no support. When I made the new plywood top and tried it out, the alignment clips bent because of the lack of support. This is why I went to the extreme that I did.