https://github.com/boutproject/xBOUT/blob/64408ea26de5751f6104fcd8598ab250e237b049/xbout/boutdataarray.py#L1168-L1169 Right-hand-sides should be `cylinder_rmin` and `cylinder_rmax`?
xBOUT/xbout/boutdataarray.py
Lines 1168 to 1169 in 64408ea
Right-hand-sides should be
cylinder_rminandcylinder_rmax?