Yesterday I spent about 3 hours tuning my 4-1201’s. I have 3 of the older type’s and one newer version. They are not made the same. the older types a have plane cover with blackened screw’s ( cross point ) and if you left them outside in lots of rain they are rusted NOT GOOD. The newer version has Stainless steel screws, no rust, This IS GOOD. I had to drill out the rusted screws to remove the cover’s. The wire hold down’s are also the same rusted steel and are not easy to remove. After a good cleaning I lubed all the moving parts with white lithium grease. I installed new Stainless Steel #3/48 screw’s. at cost of 20 cent’s each. The cost was well worth it. If you are wondering why I did this, it was because of the dirt that accumulated inside the switch motors. from the rain splashing superfine balest on everything that was on the ground. Yes too much of a good thing is bad. I will try to post a picture after I figure out how to download from my NEW tablet.
Dave