I figured you would figure it out wheel weights no extra weight on the machine a little more strain on the wheel motors possibly lift cylinders would have more strain but you would have a little extra lift when needed but I wouldn't leave them on all the time just to get that little extra help when the machine can almost lift the load. If you left them on all the time you would become desensitised about the actual capabilities of the machine and soon would be constantly overloading it. The part that the curl cylinder hooks to on the lift arms on mine bent while under waranty., they fixed it without any problems, they were nice about it. If I had been using it with wheel weights and wheels reversed I would have had to tell them what I had been doing and they would have had every right to have refused to do the work under waranty. The cost of that little repair would have been over $300. When they asked me what was I doing I could look them in the face and tell them what I was doing when it bent. They told me that the reason that it usually bends is because you jamb the machine into the work, but I hadn't did that either. When they looked at the machine they told me that one of the inside welds had only one weld pass and that it needed three passes. For the first year I wanted to use the machine in a way that was reasonable just incase the machine was a dud I would have some rights but when the waranty is up you should have some idea of what the machine is like its weakness and its strength and then you can make a more knowlegable decision as to what changes you can make without damaging the machine. But I do like to hear from people that like to make changes to their machine I can learn from them and maybe avoid some pitfalls on the way. Keep up the good work.