The Bil-jax units are proportional hydraulics...however they are also battery powered, the engine is for recharge.
you will have to plug the unit in over night to ensure you have a full charge for the next day, I am not big on the bil-jax units, their batteries are not the best from what I hear, I have demoed some of there stuff & if you think your genie is a little loose.....you`ll think its a tight unit after running one of these.
their hydraulic hose placement at the turret has many wear points, personally... if they would go to a diesel motor option, no batteries other than for emergency system down & make a few other improvements...then they would have a machine!
right now for the money I think nifty has the best all around lift...now if they would just design a better place to store their hoses they would have an even better product. I wish Ameriquip would introduce a 55-60 ft machine...that would be my choice hands down in the towable category!
good luck!!
LXT................