Hey, have fun with that Lentech. You'll be amazed how fast it shifts, especially at WOT, and especially with your tune.
To answer your question about shift pressures... it depends on how much you have increased the power of your engine. For mine (Lentech and tune, with about 155-160bhp NA), 25% hits too hard in any gear at any throttle opening. I like to run 15% for 1-2, and 10% for the others. I use higher 1-2 to compensate for the adaptive learning of the ECM, so it lasts longer before I have to reflash. At those setting it shifts like saying "wum" as fast as you can, when at higher loads.