Ok, the title is a mouthful, but it addresses a concern with the new alpha version of RSS Bandit. As of the current build, the feature to view the raw XML before it is rendered by the stylesheet is no longer there.
However, here is an identity transformation you may use. Just copy this to the templates sub folder of your RSS Bandit installation. You can then go to the Display menu (via Tools | Options) and select the Identity.fdxsl for your stylesheet. Afterwards, view any feed and then view source to see the raw XML.