Maybe you should give LeViteZer front a try. It is easy to setup and does not need much maintenance,
http://levitezer.com/resources/User-manual-1.0_En.pdf
and it is fast
https://www.youtube.com/watch?v=jyPd5e8c6mU
Double a-arm is good too, but on my opinion more difficult to set up to work good and requires more maintenance to keep it working good.