That looks nice and simple. At the end of the day, as long as it suits your purpose, easy to use, and is cheap to build - simple is best. Well done.
Yes mine was simple since this will be used once for my one and only project.....
You mean like this....
to do this....
I'll get some dimensions for you shortly if that's what you are looking for
If you are worried about a balance issue, ratchet strap the car to the front arms of the lift. That should keep you at ease. Also, before you lift the car up all the way, try to lift the front of the car off the lift while it is still near the floor. I do this all the time just to make sure the car is balanced well.