Hi, Just so you know, I will very soon release relax 3.3.4 as a major feature release with the saturation recovery and inversion recovery R1 experiment support. It also includes the bug fix for the multi-dimensional numpy IEEE 754 XML output support for the relax state and results files, which will help with the nmrglue support (http://nmrglue.com/) and saving this data in relax output files. Since relax 3.3.3, these are really the only changes that have occurred, so the release should be hassle free. Regards, Edward