I've looked at them some more. I think I'm going to make these work. The rod unscrews from the valve at the bottom. Having a mill and lathe at home, I think I'm going to buy some 12mm tight tolerance polished shaft, and just make a couple that are 1" longer. The adjuster rod inside is just a length of small diameter aluminum with the ends cut into a hex. Not the ease of ND4's mod, but the same functionality. I'll get the 1" extra travel, and have the external adjustment of the Racing Bros kit. Before I go to the trouble though, it may be worth measuring the OEM dampening rod, just to make sure the Racing Bros kit hasn't already extended the rod length.