Thanks a lot corky! I'd recommend maxima for a windowsill, it seems to deal with low humidity very well, and even a dwarf would quickly outgrow a tank/growspace!
Sorry kinda late for the reply about the N. Sabre directing to Mass' s post. N. Sabre, N. Black Dragon, Red Dragon, and Marble Dragon were selected clones of Ep's tc plants that they sold in batches back then. There were severals clones of Sabre in tc and ep never lable there Sabre clones. Ep have 3 clones of vent x tm, A, B, and C. Clone B have really wide flared peristome and A have wider mouth and C they had advertised as a mix of other vent x tm without distinct feature of A or B. When people refer to a clone C or B Sabre, they incorrectly labeling the vent x tm because there is no such clones of sabre. However, unless you have got a bunch of Sabre and u labeled them yourself for reference.
I have 2 clones of Sabre that were in the selected tc batch when Ep released them and they both looked different.