Okay, first to answer your question - yes, there is enough expansion gap, but the tool only works with a normal expansion gap if it's a straight end. If it's a 45 degree end, you have to use the rotation feature of the blade. The problem is when you rotate the blade, the metal bracket that holds the blade to the tool sticks way over the front edge. You'd need like an inch of expansion gap to get this tool to fit... so the Power Shunting Device is definitely not meant to help tap in the end boards in diagonal installs, even though the blade can rotate.
We got the suction cup yesterday and unfortunately it just can't grip the floor tight enough... when we try to tap the board in the cup moves before the board does.
I've already burned through two pull bars trying to get those end pieces in... but now we're on the home stretch. The trick was to use a combination of techniques.
I attach the Crain suction clamp to the end-board, and attach the Power Shunting Device to the clamp, then I tilt the entire row of boards upwards about an inch, but not so far that the tongues comes out of their grooves. This loosens the grip of the tongue and groove just enough so I can use the Shunting Device on the Clamp and the board will tap into place without a lot of violence. Then I lower the entire row so it slips back into place. Sometimes it helps to have two people when dealing with a long row.
My pull bars are both broken and my goal is to finish the floor without buying a new one...