has anyone experience with these?
https://www.titus.de/venture-lenkgummis-loose-trucks-conversion-kit-90a-clear-green-0199256/
They work well on two fronts:
1. For those who want a much looser truck, even just a bit more loose than what can be achieved with the normal top bushing, or tighten down to where they work for you.
2. For those who have grinded down the hanger to the point where the kingpin is sitting too high and they need a lower top bushing to keep a nut on.
For both of these options, put them on and tighten the kingpin nut down to where you need them and gently angle grind or machine off the top of the kingpin to suit the height of the new arrangement, if you don't like kingpin sitting up. It works well and adds a lot more clearance on any kingpin from any brand of truck. I could still get the nut on and off easily after doing this, but just be careful in doing it and don't over heat the kingpin in the process as it can cook the bushings.
* I could have said 3. For those who really just want green bushings, which is a valid point, but that doesn't really come into it here and now.
I have a supply of the Indy bushings with low heads, which do the same job and have used them for a long time in a lot of trucks, never having an issue with them or where the kingpin sits, but definitely have used an angle grinder on a lot of kingpins to make them work better in all situations.