I'll chime in with everyone and say that a 1-1/4" isn't necessary, and I don't believe that your saw can tension it to any reasonable level.
I had a 1" Resaw King on my Laguna 14 SUV. Yes I did decent resawing with it, but also no question that it was too large a blade and didn't believe Laguna's recommendations in retrospect.
Now with a large Felder FB710 (18", 250kg/550 lbs) it can tension a 1-1/4" blade, but I chose a 1" blade (which I measure and can easily tension to 25kpsi) and am more than happy with that choice. Like John, I use a tension meter to tension my blades (I actually have several, don't ask...)
- After I ask a stranger if I can pet their dog and they say yes, I like to respond, "I'll keep that in mind" and walk off
- It's above my pay grade. Mongo only pawn in game of life.