I don’t regret having built it the way I did, since I now always have the possibility to make Y longer. I couldn’t just make X bigger. 
Your aluminium plates look really great, I should have done mine as well, but didn’t have the time or alu. 
And if you want a jackpot, you can get one here maybe: European group buy of jackpot boards They bought a few, I think there are some left. They are in Spain, so shipping is not that much at least. I bought it from Ryan for my old Primo because I wanted to support him somehow after three years of hanging around here. 