I currrently am using the VERY dangerous "eric elm" type gate assist that utilizes a garage door spring that pivots. I have been looking into using a torsion spring set-up but cant find the right size anywhere. I plan to use 2 springs,one on each gate side, the hinge on my trailer gate is 3/4",but the torsion springs I have found are much smaller, plus there seems to be alot of application critical type data that is needed to correctly size the springs, I have been looking at Grainger and MSC supply.Anyone using the torsion springs? could you please post some pics of your set-up and tell me where to get them?It seems like once you get the right spring it would work much better than the top rail mounted type. I planned on putting the torsion spring on the gate hinge pin with one "leg" pushing against the trailer frame and the other leg will be inserted into a steel tube that is welded onto the gate. My gate is 4ftX76" long and made of 1/8" angle steel, so you wouldnt think it would be that heavy,but to lift it 12+ times a day is a real BEAR! If money was no concern, I would mount a 12V actuater to lift and lower the gate,but at over $400 a piece,thats a little much for a trailer gate! Thanks guys.