Installing a Gaku Counter on a Fuji Oval Frame. Any suggestions

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I got my Yamato CR1 today and on initial inspection, I think installing a Gaku counter on this will be nearly impossible.

For one, the shooter is located in the center of the cell not to the right. I can put a counter above the hammer track, but it will take some creativity to route the sensor wires back to the back of the machine.

If that was the worst of my problems, it would be bad enough. However, I looked at the jackpot payout motor and it's even more distressing. The lumina frame had a single motor which directed all the balls down a single hole. There was an opening below the hole that made installing a payout sensor a breeze.

The Oval frame has a payout hole for each track in the jackpot supply and uses alternating teeth to move the appropriate ball to its hole. As a result, the balls are falling through two holes, not one. To add insult to injury the whole thing is sealed.

I'm wondering if anyone successfully installed a Gaku counter on this style machine. I'm half inclined to install a battle counter instead as that will probably be able to keep track of my balls. If I add a DaveRob Dongle and a true battle counter, I think it might be easier.

Any suggestions?