Re: JIS Crosspoint Screwdriver

[William Robb]

Depending on the location of the screw, one can often pop it loose by 
putting a screwdriver into the head and gently tapping the back of 
the screw.
Obviously, care must be taken with this, but I have found that lens 
mount screws, especially, are generally rather tight, and have lots 
of support behind them.

William Robb