Which jack are you guys using? The red steal sears version?
I have, dont use much being I hv the lift now, a yellow alum sears jack and its good. 4" clearance so it goes under anything. Used mostly now for washing the bike.
And as said I mostly use this for wrenching
If you want a better jack (not lift)... go with the J&S or Pitbull. They are AWESOME!