You really solved a big problem for us europeans, i think. Now we don’t have to spend €400 on a router, i spent just over €100 on mine. (also this design seems much cleaner then the rigid, no backlash, no extra mounting brackets, and it just looks neat)
Also i got over 55 mm of travel in mine, could you take of the plastic base plate of your router to see if it really doesn’t bottom out? The bottom of the shaft should be open then. I’m just curious why you miss almost 2 cm of movement.