Where's the Facts and Figures Police when you need 'em?
Stuck at home with only a plain old fashion modem for three days :D
Hurst does make tools lighter than 70 lbs.
What you give up going to lighter Hursts, or comparable Holmatros or Amkus (sorry, not familiar with all the "B" brands Phoenix/TNT/etc), is 1500-2000 pounds of force.
That's not neccessarily bad, you don't need JL-32's on most vehicles. We recently put a Maverick in service, which gives us a lighter combi tool that can do all our routine door pops without pulling out the big guns (we own two JL-32As).
I've never noticed the weight at a call -- adrenaline sure seems to make up for it. Not that that is always good, as I'm only back to about 95% of normal strength after a severe "tennis elbow" from injuring myself at a working extrication back in April -- I didn't even know it that night, woke up the after catching a couple hours sleep with an incredibly painful elbow.