That 910 most likely spins more than what you're used to.  

Fitting is always best but a 915D3 will have much less spin.  And if you want to try something heavy, I'd look at:

Diamana S+ Blue 80

Aldila Rogue Black 80

You might consider the Diamana…

I'd say just keep your Diamana!

Rogue Black 70 is definitely different.  May launch a little higher or spin a little more all things being equal.  Might not.  A closer profile is the Rogue Silver.  

The new version of yours, the 70 D+ White might launch…

Hi Albert:

Do you still have some doubt?  

Most accounts should have someone on staff who has taken the latest product certification test. There may be a more qualified Regional or Advanced fitter near you:

http://www.titleist.com/find-a-golf-shop/

I'd stay stick with the better results instead of change!  

Hi Mike:

Well the best scenario would be a professional fitting, but increasing loft will closes the face and decreasing loft opens the face.  Luckily you can help counteract the face angles by adjusting the lie separately as well.  If I add loft, I typically…

Yes sir!  Just let us know in advance!  

Greg, sometimes the locktite product they use takes a stronger hold on some weights vs. others.  I would consider sending it back to custom shop or if you feel brave you can use a torque wrench with a weight removal tool from Scottycameron.com and it will…