Anyone fitted VGs to PA31-310 Navajo? The spec sheets give a gross weight increase but no difference to V speeds....so are they worth it? I dont need the gross weight increase On a like for like basis - i.e. at same weights what are the real world differences? I had them on the 340 I used to own and they were considered a must have (decrease in Vmc below stall), but doesn't seem that way for the 310 Navajo (possibly a different story for the Chieftain where there are reductions in V speeds)