Vac-bags - anyone used them..? 
  Hi all..
 
 Anyone ever stored their bike in a Vac-bag?  I'm about to buy one, and wondering just how they work.  Are they laid on the ground whilst you ride onto/into them, so-to-speak?  Do they then zip up?    
 
 Also, is there a problem using the sidestand?  Will it eventually puncture the polythene?
 
 Steve