Fear no evil, she'll hold 14" with no issues, and any dealer that says otherwise needs to jsutify why that tank won't hold 14"...even my M-5 super porty will hold 14"...lol
the good thing is once you get the shaft spinning, its not all that much more torque. I think the new 3 speed system will help even more, not jerking the unit up to full speed right away.
there's a fair amount of difference in stress load between 12 and 14HG.
Between 10 and 12 HG there's not much difference , but there is between 12 and an honest 14HG with a 47 blower
i suspect that's a big reason why most manufactures set them in 12 range
Mine was set at just under 15 and it's now at around 14.5. I seriously doubt it stays up there unless cleaning CGD. But 14-15 is what it said in my book for the lift setting.