That will fix you issue for now, HOWEVER, you should disassemble the bottom part and clean the parts, lube them and then it will be good for a long time. only have to remove two screws, then the entire ratchet assembly will be available, the pivot point is the part that collects the gunk and dirt, clean all the parts and lube using some white lithium grease.
as for the credits going on the machine, you have to press the cash out button before playing the machine, then any wins will go to credits, not sure if a setting will change that??
Crazy Double strips will be challenging to find.
check the area around you NICAD battery, they have been known to leak, and it will damage the board and put your machine out of commission!!
Hope this helps.
Jim