entry path

I'm new to sheetcam: I can't figure out how to repeatably get a good entry path into the part.  (with respect to orienting the blade)
It seems like Sheetcam calculates something different every time... and it usually draws the blade perpindicular to the path (like in the attached image) rather tangent into it.  

Am I supposed to be setting the 'Lead In' function? even if so... it doesn't really seem to work repeatably either.  

2ndly. is there a way to tell it to orient the blade inside the part area vs. outside? so that I am not putting surface scratches into my part?  
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I manually set all my start paths and frequently alter the cut direction as well. This allows me to start each cut in the same direction.