What size boat stands for a Typhoon?

[Alan Stewart]

I'd like to acquire a set of boat stands so that I can pull the trailer out from under my Typhoon - what sizes work the best? I've seen a photo showing two tall ones supporting the rear of the boat and two shorter ones forward below the bootstripe - would four shorter ones work just as well? Seems like the taller ones in the rear would facilitate pulling the trailer out, but what about the forward ones? 4x4" A-frames and rented staging are too much trouble I think... Thanks for your input!