My aluminum trailer has a built in ramp that is too steep to load the Sling shot so I bought 4 ATV ramps rated at 750Lbs each. I aligned two with the outside edges of the trailer's original ramp and two in the middle. I drilled holes on the ramp tongues and matching location on the trailer floor. When it's time to load or unload, I grab the ramps off the trailer hitch A frame, Clevis Pin them in the right spot and drive right up, easy peasy. If my kids are helping, it takes about 10 minutes to unstrap (I bought a set of "racing tie downs" by Vulan for the front two wheels) and move the Slingshot. I did also mount a latch on both sides of the rear trailer and run a strap through the back rim to secure the drive wheel.
If my kids are not helping, it takes me about 5 minutes. J/K, it takes m e about 15 since I am moving all the ramps myself.