I ordered two 5 mm and two10 mm solenoids, (for the pre set solenoid) , it was missing so a rewind was not possible, sence 1/4 inch is in between 5 and 10 mm one of them should work there, not sure how far it has to move with nothing in there, but they did leave me the linkage rod at least. I found two wires cut in the key box from the change box - a red and orange wire, they were spliced into the free play switch, the solenoid they went to is not activating with the wires hooked back up but it works if you push it in by hand, another solenoid in the key box releases it - that one works. The ground sw on the change box sticks but it works sometimes, the plastic lever rod is not removable so its hard to clean it, but maybe some really light oil can fix it. The manual has a lousey troubleshooting section - all 8 pages are a waste of paper and ink ! , It took me hours of studying the SKU to make any sence out of the Manuel. Very Complicated is certainly an understatement. Unless you work on these everyday the manual is just about worthless ! .