I thought this would be easy. All I wanted was a quality fret saw to cut dovetail and box joint waste. Knew Concepts would provide the product. Then I found out there are many variables. Titanium vs. aluminum--- screw tension vs. lever tension---fixed blade vs. angle blade--- 3",5" or 8"depth. Now what to do? Please advise me all I need is the economy $60.00 model rather than the $200.00 version.