Many years ago ran into trouble when 7mm bit from Packard Woodworks, did not drill holes big enough for 7mm tubes from WoodturningZ .
Eagle and several other pen turners used to recommend this drill bit index set along with digital fractional calipers.
115 Piece High Speed Drill Bit Set w/ Drill Index
Thought here is by measuring tube allows you to select best bit for the job. Additionally recommended a Drill Doctor to sharpen dull bit as required.
Prices for these items lot cheaper back then, but idea here would really help your current dilemma.
Yes, lot better drill bit index kits around.
JMHO, epoxy and polyurethane much better gap filling glue than CA. Have never used thick or gel/rubber CA glues.