STEP File Modelling Assistance

Hi all,

I previously had some help with getting someone to export a STEP file for me, but I need some additional features added to it. The model is for a bearing plate for a bridge which is accounting for a stuff up made on site.

The blue lines in the dwg are to be M30 tapped holes, the cream lines are to be 32mm clearance holes and the red lines are to be 73mm clearance holes.

The rest of the model is the bearing plate is green which is watertight.
Any help would be greatly appreciated as I don't have the skillset for this type of modelling.



Cheers
Chris