Conduit that locks in place and good anchoring will work. If you share your plans, I'm sure there are a million owners who will thank you for not putting them through the rivet and spring loaded hinge exercise!
In case you decide not to reinvent the wheel on the lift mechanism, take a bunch of hinge placement photos and put markings on the attachment spots. Use the old panels as templates. Lift and close the thing a bunch of times, to make sure what you copy is worth redoing (mine was seriously cockeyed)... The geometry is not that tricky, but with three hinges and a ton of rivet work, it's nice to have a good working movement.
Best - HughDog