Updating a Ulterra

[peter8]

I am wondering if anyone knows if there is a update / new board for the first generation (2016) of Ulterra. I have one on my tiller and just installed a new one (2019) on my 219. The difference in spot lock is night and day as the first Gen may put me within 15-20 Ft. and the new one is pretty much right on.. Thanks for any help.