[Elecraft] Design reasons for X7-X11 case soldering

[Jason Hissong]

Hi guys,

Just got done grounding X7-X11 on the RF board.  That was fun (trying to 
solder the side close to the resistor packs.)  Looks like I could have 
gone a little higher on the cans.  I did about 1/8" instead of the 
1/4"... oh well....

Anyways... was wondering why you have to solder both sides of the cans 
instead of just one?  I would be interested in knowing the reason. 
Mechanical stability of the crystals?

Thanks es 73

Jason Hissong
N8XE