Dive only Floyds have better tone when set up correctly. The bridge will sit flat on the body and the vibrations of the strings will resonate much better through the firm contact of the bridge and body. If you have to have pull up, the first thing you have to determine is how much do you want? Half a step can easily be obtained by raising the bridge, AND loosening the tension on the springs. If set up properly, there is over tension on the springs to hold the bridge tight against the body. What you want to do is to achieve a balance on the bridge where the baseplate is parallel to the body and you are in tune. Once you have accomplished this, do not activate the D-Tuna as this will change the tension on your strings and now cause the bridge to pull back sharp. When you have achieved balancing the bridge with a one-half step pull up, measure the change in string height over the board at the highest fret. Also carefully observe the change in the angle between the nut and the saddle. Now remove the neck and shim the pocket to return to the original action and angle of attack.
If you require more than one half step, you will have to ROUT a cavity below the baseplate. Depending on how far you actually desire to pull up, you may have to even remove additional material to clear the string lock screws.
I would advise against this. After years of playing free floating trems, I switched to Wolfgangs. It took a little bit of getting used to, but for me the benefits far outweighed the loss of pulling up on the trem. The guitars stay in tune much better when traveling through different temps and humidity levels. I don't hardly break strings any more. I've become quite addicted to the D-Tuna, I can't imagine not being able to go to drop D.