Hi Jeremy
I have 210 flight passes on my 7-35 with 7% oil
Sure I have had problems and those with the carburetor.
If you look back in the history of these engines.
where Maxam writes about the carburetor to 9-99 & 7-77.
I have written about 7-35 when fine carburetor took a fron saito FA120r3.
Lars