I have installed on my Thruster an IVO 3 bladed ground adjustable prop...I couldn't be happier! This is one easy prop to adjust! Unlike the older style 'adjustable props' that needed blocks and lots of different adjustments to get it just right, the IVO have just ONE bolt that is loosened and then using a tool (like a screw driver) you can turn the all 3 blades at once to the desired pitch angle - no blocks or angles to work out. It literally takes seconds to adjust! Here is a cross-cut picture from their site to show how it works: For other ultralight flyers I would highly recommend this prop - it comes as a ground adjustable or an inflight. A great prop! Certainly takes a lot of the guess work out...
