cool, have to look again at cost of pro ver.

The Basic free version does about 75% of what most of us would need it t odo, except Boolean operations which would really be useful when trying to clean some of these broken models.  But for the price, FREE!, it does quite a bit.

The Private version does about 98% of everything you could possibly want, and costs $300, but you could only use it for personal, non-commercial projects. 

The professional version adds a whole slew of esoteric features and that frankly are not needed by most hobbyists or professional users, but lets you use it for commercial purposes.  For that privilege you get to pay $1800.

Hmm.....  I wonder which one I'd get if I had the money.

@accusedmonk- Thank you for that as well! I haven't experimented with Cura one bit to be honest, and your post reminded me I had it Looks like some tinkering fun in my future

The paid version has a more powerful feature called "Free Cut" which allows you to draw free hand the area you want cut in multiple planes.

Also, Cura, which is integrated into Repetier Host now, has the cut feature built in to where you can tell it to cut off so many mm's of the object botttom.  It's how i printed the tank, it's nice being able to make an exact amount with it so you know how much and don't end up missing a portion of your print.

EDIT:  Pirvan's solution works!

I could have sworn I saw this feature used in Netfabb or Skp, but I do not see it. Currently, after saving the complete .skp, I'm having to go back in, and delete sections in order to get them down to a printable size.
This route I am taking works, but isn't there a program feature that can separate chosen areas?

I'm not sure if this is what you want, but NetFabb has the ability to cut through an object in all 3 planes (X, Y & Z).  You can also make angled cuts, by simply rotating the model and then using the X, Y or Z plane to cut it.