Identifying modernish Daiichi machine

[PropertyCO]

Hey, recently got into pachinko machines.

To the dismay of my wife, i've acquired 4 this week.
Two type-a Nishijins
One type-b

And then there's this Daiichi machine I'm trying to identify. It seems to be Dororo themed passed that I am unsure.

I'd like a service manual or any tips as far as how I can modify it to afford more payouts.

Thanks in advance!

daiichi.jpg