I bought 30# lifts from Amazon. 20 inch 30 lbs Gas Prop Lift Spring Rod Strut Heavy Duty Tool Box Lid Top RV https://www.amazon.com/dp/B00Y3H2QZI/ref=cm_sw_r_cp_tai_p-MVzb5HMYTEE
The hatch worked fine after just replacing one, so a 25# set would be perfect if such a thing exisited. I replaced both, and the hatch is very happy to rise up, and works great.