When it comes to being shut down, time on is not your friend. The more time your on, the harder you're shut down and the harder it is to come back. If you look at a worst case scenario where someone is on for a long time, their nuts shrink all up and stand a chance of never coming back. So that tells me there is a gradual increase of the degree to which one can be shut down. Is it linear, who knows? But I know it's not like one day you're doing fine and the next you can't come back anymore because you're too far gone. It's a gradual thing and the more time on the worse it is. Will 2 weeks make a difference? Well, it will definitely be harder to come back but will it be impossible? I doubt impossible but definitely harder. In fact if the decline is a linear one, it will be exactly 150% harder.
As far as HCG, you can become desensitized if on for too long, but not for a short burst like two weeks. I haven't used HCG with exogenous test still in my system because I don't believe my body sees the need to get things rolling again with the high test levels still there. I realize that HCG is a LH mimicker and it acts at the testicular level as opposed to the hypothalamus (sp?), however, this feedback system in our body is very complex and is designed to maintain a proper balance of things. Whether the pituitary is up and running or not yet when HCG is introduced, I still feel that there are processes at work that will counteract the HCG because of the high test levels still in the body. My opinion is to allow the test levels to drop and then introduce the HCG so the body sees the need to bounce back. As far as 8-10 weeks it's actually 1 week I was thinking as you would stop the test week 8 and then start HCG week 10, only week 9 you would be without anything except diminishing test levels. That's how I see it good or bad right or wrong.