Just interested in the software because v12 has a modified bleed valve law above 4000' density altitude. Depending on the elevation of your airfield and the pressure, with OAT in the mid to high 30s you are getting close to 4000'DA. Obviously in Aberdeen we never get near that so have not experienced it, but there is always the chance of a software issue eg around the transition zone at 4000'DA reducing the surge margin too much.