That UPR diffuser looks like a good design. It extends the baffle deeper down into the can as well.

Also apperantly mounting the can onto the engine is wrong because it acts as a heat sink that way. With the catch can being hot next to the engine it doesn't allow the vapors to condense and drop down into the can versus it being mounted somewhere a lot cooler such as the inner fender.

I'll probably re-locate my catch can on the inner fender. Just need some longer hoses