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??
KTM-2014 500 EXC, 2014 690R, BMW- 2015 F800 GSA, 2012 K1600 GTL, Ducati-2015 Hypermotard SP, and 16 other motorcycles in various stages of restoration.