Also using Ctek MXS 5.0. Bought this because of the temperature compensation as other cars at our previous house lived outside in all weathers (bikes had first dibs on garage space).
Excellent charger. The Morgan is currently hooked up via the dash 12V outlet using Ctek's own plug indicator plug. No problems so far but will probably sort out a direct battery connection at some point.
2017 4/4 80th Anniversary