One of the challenges of designing around 3D printing is dealing with shrinkage. A simple way around that for me is this tool I designed a while back. You take a common size object, like a 608 skate bearing, and see what hole with what offset applied does it fit or gives the fit you the desired fit. The top half of the board has incremental changes of .0025" for those who design in imperial engineering units and the lower half is in .05mm metric increments. I do a lot of work with ABS plastic and it shrinks more than PLA. I would print this tool with the same settings you plan on designing your part and with the same plastic for the best results. I have included the step files so you can make any changes you deem necessary. Hope this tool can save you time and mental energy when doing your own designs.