Chain tension and eccentric adjustment....chain stretch?

[TAftonomos]

Well, not really frozen, it just wont rotate past a certain spot....where the caliper goes to the end of it's travel and tries to come back.  I'm assuming this is the limit of it's travel/adjustment....or should it spin all the way around if I ask it.

I do understand that the eccentric should be between 3 and 6 oclock if viewed from the left side of the bike.

Current gearing on the bike is 14t and a 41t.  The problem is I run out of adjustment/can't tension the chain properly, and there isn't enough adjustment to remove a complete link (2) and re-rivet.  The eccentric would be well into the 7-8 oclock position...  I tried it this way, and without a rear sprocket change (maybe a 43?) I don't think it will work.

With the 15t I have laying around, the chain will tension properly (30mm), and with the swingarm at max adjustment/wheel clearance almost zero, the chain has zero play at all.

My question(s) are:

Should I stick with the 14t front, and go up to a 43t rear?
Should I go with a 15t front and leave the 41 rear ?

It's a EK520 chain, is it going to stretch to the point I run out of adjustment with the 15t? 
Other idea is to go to keep the 15t front, and go up to a 42t rear which would put me in the sweet spot for alignment.  Then again, thats not really ideal gearing for the bike.

I miss my 999.  There was tons of adjustment, you could run whatever gear you wanted without dicking with this SSSA....

[TAftonomos]

Guys, I'm dumb.

I just found my old chain and sprockets.

104 links, 14t/43t.  It worked before, it'll work again.

I'd still like to know about the eccentric though....should it rotate all the way around, or stop when the caliper runs out of adjustment?

[Speeddog]

IIRC, they just stop when the post gets to the end of the slot in the caliper bracket.

Never confirmed that specifically, as I've never needed to...