Lots of people have combined the two with no problem. Some time ago, I actually e-mailed Jim Chambers and asked if they were compatible, and he said that, chemically, no they were not and did not recommend combining them. Based on that advice from the maker, I stuck with the Chambers oil and didn't combine them. As I said though, there are plenty of reports from people who have used the two together without mishap. Pick your advice! Just sayin'.
Gregg