I'm not able to fit the 3mm rods inside their bushings as described on p162 of the build manual. My calipers suggest the rod OD is 3.04mm, while the bushing ID is 3.01mm. I've tried the drill method suggested in the manual, but I can't do the first step of getting the rods inserted, despite applying a fair bit of force and some heat to the bushing. Are there any suggested workarounds? Thank you!