Dear firedrakers, I'm going to attempt a pyOP2 installation this evening. As I've already mentioned to David and Lawrence, I'm concerned about breaking my build for our quads Fluidity branch which requires Petsc 3.1, which I currently bring in via an environment module. Do I correctly understand that if I pip install the python Petsc 3.4 module that this will be installed somewhere else and won't cause me any bother when I try to use the quads branch? Please reassure me and let me know if I have to do something other than what is written on the pyOP2 installation page in order to get this right. all the best --Colin