I inherited a 1949 United Aquacade which I've gotten working pretty well except I find that the flippers are a bit anemic when I compare it to one video I find at

Does anyone happen to have a good parts list for the machine, in particular I remember talking to the person who owned it years ago and him commenting about trying to find the right spring which would push back the flippers but not keep the solenoid from running right. I've cleaned everything pretty well and replaced the coil sleeve, but while it is certainly playable, I would really like to improve it.

Any pointers would be greatly appreciated.

Thank you! That looks exactly like the the flipper arrangement on my machine and that spring seems like a much better choice than what is currently on the machine... Next I have to figure out what that flipper coil actually is to get a replacement. The current spring on it is a very small light spring so it barely brings it back, but any stronger spring and the flipper coil doesn't seem to be able to pull the flippers.