I don't have a T10 but rather a T20 and my P2D body screws in. There's a 2-3mm gap at the head so it's not a sealed fit. I was able to change levels. If you were to sand the P2D body down a few mm, it would fit well. Of course, the T20 running on a single RCR123 immediately went into low battery warning on the highest level but ran normally at lower levels. The L2T body fits just as the P2D.