When I had to take the mount and legs off my Rv-3, I bought an ATV/Quad Bike lift. Made a wooden saddle to fit the belly and add some height, which supported the aircraft on the mainspar carry though.
RV-3B G-LILB - Ex-N159SJ UK import Sept 2022
RV-3B G-CCTG - Purchased May 2020
RV-8 G-MIRV - Finished July 2019 - sold
RV-6 G-BZRV - Finished July 2002 - sold