Stage III VS Stage IV

[Ybcuz]

Anyone here do a stage III upgrade and regret not doing the stage IV?

 

[2017 SG]

I absolutely do. Stage 4 wasn't available when I got my bike which still pisses me off. Came out a month or so after the 60 day "include in warranty" period, I even offered to eat the stage 3 if they would include in warranty and dealer tried with motor co but no luck.