I have the Tin Lizzie 18SL and I love it! I don't have room for a large frame so I bought mine with the sit down table. But, someday, when I have a home with larger rooms I can buy the large frame and a conversion kit to use mine as a stand up model machine. FYI...the best thread that I've had luck with is the thread sold on Connecting Threads. Of course...this is the word of a newbie! I just got my machine a few months ago so I haven't experimented with a wide variety of thread, but so far...Connecting Thread has the thread that I've been most successful with on this machine!