I have mine set at B1, but moved it up to C4 when I felt that I wasn't getting it high enough in the air during the rainy weather.  Now that the weather is warm and beautiful, am thinking about moving it back down to B1.  I would also be interested in hearing what everyone else is doing?

I have all mine on A1 (Std). My swing was developed on a nuetral club face bias, and anything else is more confusing than helpful.

When fitted for D2, 9.5 loft driver, B2 was the preferred setting while on the simulator.  Soon after playing the first round made a few changes between C3 & D4 for improved ball flight with the previous versions of the ProV's.  After playing with the new ProV's, found that the best setting for me was the A-1 for the new balls seem to promote a higher launch, true flight and increased carring distance. During the normal winds of 7 to 15 mph, I stay with the A-1.  Of recent our winds have been 20 to 25 with gusts approaching 40 mph and have switched to the D-1 which reduced the club loft to 8.75.  By switching the loft for the higher winds, it provided consistant distance and ball flight. To answer the question, I change based on wind speeds and humidity prior to round as well as forcasted for the remainder of that day. Maybe it's just a brain game, but able to maintain constistant scoring was proof enough for me to change for the conditions.  Thank you Titleist!!!!

I do the same thing.  If the weather has been rainy and the course is wet I set my 910 D3 to C4 to have additional carry to offset the lack of bounce and roll.  If the course is playing hard I use B1 and blast away.

I've messed with the loft here and there A3, A2, D3, but I need the clubfaced closed.  Just an awesome driver.

My main setting is C-1. However I have had one or two days where the B-1 just worked better for me.  I absolutely love this driver. Just awesome.

I don't know about 910's, I have yet to see one. But there is an adjustable driver bought used at the clubhouse and the man using it has adjusted it every time I see him, and he adjusted it again after our round today.

He is like me in that he doesn't ground the driver, so I don't see how that thing on the bottom has any effect.

I think he has fun fiddling with it. But I think this driver will find its way back to the clubhouse.

Thomas,

Typically, I will leave my sure fit setting alone unless I'm going to play in a different climate or different course conditions.  I went  on a golf trip to Bandon Dunes last month and it is very windy there.  I left my driver setting alone as the new 910D3 drivers are awesome and you can still hit the ball high and penetrate the wind.  However, I adjusted the loft on the 910Fd fairway by reducing the loft by .75 degrees to hit a more penetrating ball off of the fairways to keep ball lower and out of wind.  I also spin my 3-wood much more off of a fairway lie so less loft also helped reduce the ballspin in the windy conditions. 

I change the setting all the time not on the way my swing is for the day but the way the weather is i live in SLC and in  the spring we have wind and rain all the time so thats we i made the change tothe 910 becouse you can make a change for the weather i do make a change on the 910 for the type of golf course i play but once i get the setting the way i like it i leave it that way .