There is a discepancy between the parts list and the parts diagram round the router carriage supports. The clearance is to small to clear the pipe adjusting bolts. If the detail drawing is used all is ok.
When drilling and tapping into the edge of MDF support the outsides with clamps to stop the fibres separating. Make sure all threaded holes are coated with superglue left for a day and re-tapped. This helps prevent thread stripping. Repairs can be made by coating the thread with 5 min epoxy and redrilling and tapping. Tapping can be done very carefully with a slow speed battery drill.
The main modification I am going to do is
Replace and extend the bottom torsion box skin out to the edge line of the whole router footprint. Use 3/4" instead of !/2" MDF (the bottom bolt heads on the carriage may have to be recessed to give suffient clearance). I will then use 3/4" MDF to put some sides on the unit that will be supported by bolts into the edge of the extension. This should provide a stable platform to provide some additional support to the Long Pipe rails. The support can be packing or bolts and lock nuts.
Others have lamented on the size of the X bearing pipes also. It may be worth considering using the larger size pipe on this axis. This would mean the larger adjustment blocks are needed with a corresponding change to the hole sizes in the carriage sides.
I have only cut one Item 3days ago just as a test. I still have items to complete on the unit so am being good and resisting further temptation. So these modifications are really only solutions to comments on the forums. I however have noticed the flexing while adjusting the linear rails (pipes) into position.
These modifications IMHO although very minor in nature would make this excellent machine even better.