Is there anyway to view pages in Preview Mode in author instance without authentication?

I want to know the maximum capacity of a single publish instance from following parameter1. No of Pages/Templates2. Maximum number of nodes.3. Maximum number of page views4. Maximum number of dynamic pages5.The replication capability . Any other parameter to be considered for a stable single publish...

What is the recommended ratio of author to publish instances ? What is the maximum number of publish instances for a single author ?

 Can we have more than one dispatcher for one publish instance ?

How robust and stable aem will be if we use single author instance for multiple different publishing environments

The problem with the versions is that , it creates a new version whenever a page is activated. I want to maintain single version for a particular publishing destination

I want to maintain single page with two or three different versions for corresponding publish instances. Example I want to maintain two different version of single page - for testing and development .I tried version for pages , but it automatically creates new versions for every publishing

How to access sightly JS object in javascript of sightly HTML .?

I am able to access design properties by using ${currentStyle.propertyName} in sightly html. I want to access it in sightly javascript. I tried currentStyle.propertyName , but it returned empty value. It works well in sightly html

currentDesign didnt work; currentStyle worked. Thanks