I see my YouTube videos plastered with these guys advertisements. What see is the cheap one is TBI and the more expensive one is TBI with timing control. I assume the same issues as FI Tech and thr Sniper. Thoughts on the latest "self tuning" efi? I know the comment has been made these TBI add no mileage or performance benefits. I would assume SEFI with timing control would gain down low and give up a few HP up top to a spot on, properly sized carb. Thoughts?