I've had to pause my Quickie build, having printed the wings and Canards my Ender 3 can't print the 8.5 and 3.5 mm tubes accurately enough to accept the carbon rods. The 8.5 tube measures 7.8mm. Drilling out doesn't work, I used a 3mm drill but the flexibility in the PLA contracts the tube when the drill is removed. I tried a 3.2mm drill but ended up with spaghetti inside the wing.
I'm seeing 3 possible solutions
1 Recalibrate Merlin so that everything is bigger, but the printer isn't undersize ordinarily
2 Scale everything 5% in Cura. That would work but also scale up servo mountings and anything else.
3 Use the "Hole Horizontal Expansion" setting. This sorts out the carbon tubes, (except the fuselage wing mounts which are not recognised by Cura for some reason) but also expands internal "holes" including the inner fuselage.
Any suggestions from viewers on the best option?
Longer term it would be wise to issue STL's with normal and large clearances for different printers as they are far from precision instruments.