Quad City Challenger II ELSA

Left side, plane drops onto its front wheel when started
Right side. This aircraft has always been hangared.
Rotax 582 Blue head, mounted upside down. New plugs and filter. Carbs inspected.
we deflated the right tire to do a start test. We had to take fuel out, and the fuel intake is on that side.
Engine runs great. It has much more power than it needs.
Strobes and landing lights work as expected.
All switches labeled and functioning.
Doors are easy to put on and take off. Doors are not on it at the moment, but they are in the hangar.