I think it would take a bunch of work including re-modeling some of the parts to make this feasible. Here is a post of someone who scaled the MPCNC to use 1" conduit which is about 29.5 mm. His topic highlights some of the problems you may have. For example the hole spacing for the NEMA 17 motors will be enlarged and therefore will no longer fit the motors. I would be concerned that the holes for the bolts the bearings ride on would be enlarged and become sloppy. The holes that are used to hold down the T nut and to screw on the limit switches would be too big for the specified screws and possibly too spread to mount the part. The spindle mounts would need to be enlarged to fit on the tubing/mount and therefore might not fit the router/spindle without modification. And I’m sure there are more items that will need to be addressed. And the topic I mention above cuts off before he is finished with the machine, so we don’t know if he got it working well in the end.
If you decide to move forward with this project, go down through the part list and think through every place where a piece of purchased hardware (bolts, belts, steppers, etc.) is married to a 3D printed part and what that would mean when the plastic part is enlarged.