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 GS800 Adventure, and 16 other motorcycle projects in various stages of completion. It's an addiction thing.