Oh, question 2.
Now I should know a alot about this.
I had clutch housing and side cover breather, with little filters on end of them. It was all good for a while, then it started using oil, dumping out the side cover breather actually.
I then found my clutch cover breather was blocked (with all that mesh crap inside! It traps all the gunky oil up!  ), and there was too much crankcase pressure, so something had to give. Cleaned out that breather and presto, all was good again.
But in not too long, it all happened again. So this time I got a catch can and plumbed my breathers in. Did away with the side cover breather, as it was getting too messy with all the supercharger bits being up that end. And put a breather on one side of the rocker cover, ran both clutch cover and rocker cover to a catch can. All was good.
Then it slowly started burning oil, getting worse and worse, found once again my clutch cover breather was blocked, cleaned it out, oil burning died but didn't disappear. Fitted another breather to the other side of th rocker cover and got better. Not perfect, but not bad.
Basically, I think what's happening is that compressed air is going passed the rings and compressing the crankcase, so to reduce the pressure it needs to breath. The more breathers the better.
Clutch cover only won't be enough, and make sure its always clean. 2 breathers, minimum IMO.
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