Dingy was making the cables out of 4 AWG Welding wire. That alone helps a lot. The 4 brush starter alone helps a lot. Together they are great.
As for the battery, I also put an AGM battery in my bike and it did crank faster, and it died after just 18 months. I'm going back to an Yuasa, they always last me 5 or 6 years and get the job done.