If your kjet setup is working fine, and you want the conversion done in a day, leave it on kjet. If you want a bit better fuel economy, go for digi.however, a digi loom is then needed and all digi ancillaries, the loom then needs splicing in to yours before plugging into the engine, and really you've got to take your dash out to do this..I had to remove dash to do my kjet, as it was a carb before. I used a complete kr car for everything I needed. Had I known what I know now I'd have prob done it digi, as I don't plan to sell the car etc etc, so the extra work would have been worth it to me..