Hi thats some temperature, the 625 can be retro fitted with the same height system as the T11, Dewalt manufacture both the T11 and T5 for Trend but for table work the big orange Triton is the way to go, plenty of power but no good out of the table thats where the 625 comes into it's own. You are aiming for 30mm T&G but have you thought of other options for clading/siding such as where the boards almost butt together and a cover strip goes over the joint, not sure if it has a technical name. With 30mm boards using the cutters I mentioned from Wealdon will allow you to set the tongue and grove sizes to what you want but limited to a depth of 22mm. These three wing cutters work very well and give you several options on performing the task you face, and if cutting the tongue with two cutters seems a struggle with the resinous pine then use a single cutter and run it through twice having flipped the board over, then once you have the tongue cut the corresponding grooves.
