Very good idea ..... will give it a tryAt the drug store close to the toothpaste you can find Gun flossing hoops which I use to thread line through blocks. You push the stiff end through the block, put the line through the loop and pull on the stiff end as the line goes throughView attachment 105600 the block. Won't work too well for 2 mm blocks, though. For them, the best way I've found is a little CA applied to the end if the line so only one thickness needs to go through the block.
I did not think of using CA glue to make a needle end of the "thread" through the block but instead use some Titebond original wood glue on my finger, being water soluble is easier to clean off. Not as fast as CA possibly but it works for my pace. PT-2Very good idea ..... will give it a try
My own adhesive of choice for this is Tightbond. Being water soluble the cleanup of fingers and any thing else is very easy. The thread end is rotated with the same lay as the thread and when dry the tip is cut off at an acute angle for a good point. There are not right or wrong ways just personal choices. PT-2Running it through your fingers makes sure that you are not thickening the thread at all....
They work OK for larger blocks but 3mm and 2.5mm have not worked; so I use the glued fingers to twist the thread into a needle end and trim it at an angle. (extra cloth nearby for the fingers and not pants) PT-2My local Tesco store sells needle threaders as a pack of three with a thimble. I have a lot of thimbles.
Fuse wire makes a good equivalent threader for situations where the item cannot be passed through a needle threader.
(E.g. on a bight, loop, of link of a chain). Double the wire round the cord or thread it through the end link of a chain.
Thread both free ends of the wire through the hole and pull.