Digital BW, The Print

> No they are not normal teething problems.  The needles simply 
> gently twist on to the bottom of the syringe (once the protected 
> cap has been removed by twisting it the other way). Same with the 
> bottom fill adaptor. Honestly it could not be simpler.  These are 
> stock standard (medical) syringes and needles.  

I agree that this is simple in concept. That's why I'm not a happy 
camper. 

Only a first time user would not have known that the syringes where 
capped. I take responsibility for that snafu.

But once removing this cap, I attached the needles just as you suggest.
On four of the nine I had the problem mentioned. The other five are 
okay. 

On at least two of the tests with what turned out to be bad needles, I 
heard a "snap" as if the needle collar broke as it was being attached 
to the syringe. Okay, maybe this would happen if someone was using a 
pair of plyers to screw the needle on but I don't expect something 
like this to happen when just inserting the needle and hand 
tightening. The "snap" occurred at the beginning not the end so I'm 
confident that it is not a case of too much force being applied.

Then is it just bad luck?