So I've been wanting to put arm rests on the seat of my L3901 like what the newer B2601 tractors have on their seats. Then I just happened to notice the b2601 appears to have a much nicer seat altogether. So my thought is, does anyone know if the seats are interchangeable between the two models of tractors? It seems the b2601 seat would make a nice upgrade over the stock Standard l series seat if the swap would work.