The inline modification is a very easy way forward - and I know I'm likely to get some flak for this, but I'd advise members away from Circoli as we had issues with (quite literally) half of the batch we bought from them not sealing properly and running at mid-60s instead of 80+ degrees.
There's plenty of brands out there that do work - First Line, Gates, Waxstat etc have all been fine. Mostly available for a similar price too
Again, just my 2p. Not meaning to cause a ruckus...
