There are a few homemade items on my Funhouse... But they are mostly under the play field. From memory, Rudy's lower jaw linkage and the steps gate assembly. The bracket above left ramp was mostly a home-brew construction.

I'm lucky the game even flips. I was literally missing 20+ items for the play field when I bought the game and the only reason it's alive is some random 5+ year old ad on Mr. Pinball with the title "Parting out Funhouse". I sent a PM and after waiting a few weeks, the response was essentially that this person had 15 different assemblies that I needed all bagged and labeled in boxes from a parted out game years ago. I think it was an old operator but I really have no idea. I remember talking to the guy on the phone and I want to say he was form TN but I really can't remember and it was difficult to understand him. I sent him a $80 money order for the parts, if you can believe that. Back in the day, that's how you did it. Everything showed up in better condition than expected.