Been running a JD410D extendahoe for years so I know what working controls feel like on real machines. Purchased a MMS 15PRO mini excavator from Amazon to work around our home where we retired in north idaho knowing full well what to expect from these mini chinese excavators from months of research and youtube videos. The little mini is quite a capable machine within its capacities and limits,and I'm not trying to excavate with a damn shovel at 72 yrs old any more. What was driving me crazy was the extreme jerkyness of the pilot controls. I could make it work by holding the rubber boots at their bases but extremely hard to be precise and smooth at the same time. I 3d printed my own pilot springs from tpu filiment but this only made it worse, , so I broke down and purchased the sp66 gen2 spring kit hoping it would help. I'm amazed! it fixed the jerkyness problem completely. the mini now works as it should. Don't need to add feathering control valves to the hydraulics or any other repair as suggested on multiple youtube videos, best 30 dollars I've spent on this mini so far. Thanks for the Great product, my mini is now very Usable!! Awesome Product and well worth every penny!
