The Z-Plus router mounting bracket is 1" higher. And this is even more important for the Makita router sold by Carbide3d with its shorter length. This doesn’t limit its length of travel but you have to account for this higher starting point.
The solution is to use two MDF spoil boards. IMPORTANT - This does NOT include the base 3/4" MDF that comes with the machine. From what I can see in your photo it looks like you are using one spoil board.
Per a suggestion from this forum I added a 1/4" piece of pegboard on top of a second 3/4" MDF with holes aligned to my 2" grid of T-Nuts for clamping to raise the bed 1" With that I can reach to the bottom of my MDF spoil board with an 1/8" bit.