PLA calibration

If there is one thing my Morgan has battled with, it is plastic being soft (and sagging if on an overhang). The cure for this is cooling (via the fan) and playing with the cooling settings in Slic3r. Up to this morning, I did not HAVE a fan, but with PLA I can see that it is necessary. Firstly, ABS-Filament (from whom I got my PLA) suggests both their PLA and ABS prints best at 230. This is warm for PLA in my opinion, but this is what I use at this moment (after the first layer I drop to 220). I am down to 60 degrees on the bed temperature and printing on bare glass. I have to extrude the PLA faster (I use the extruder multiplier setting) than the setting that worked for ABS.