Seriously considering that conversion myself. Absolutely add the steering stabilizer. Even without the 21" wheel you will notice a major difference on dirt roads. Scotts Performance is finally saying they might have a kit this year. Go with that or a GPR. Much cheaper than the Rally-moto with exactly the same performance.
What clamps did you buy? Pics??
2014 KTM 690 Enduro R, 2014 EXC500,2012 BMW GTL1600, 2015 BMW F800 GS Adventure, , 2015 Ducati Hypermotard SP and 16 other motorcycle projects in various stages of completion. It's an addiction thing.