When my wife first needed hand controls we had Jeff Gosling ones, but they drove me mad as the connecting rods were outside the steering column and whenever I drove the car I bashed my knees on them getting in and out. I assumed that they were all like this, but someone on this forum recommended a different make where the rods were fitted within the steering column so were out of the way. It was some years ago and I know that the steering wheel ball was a different manufacturer to the push pull control, but one of them was Brig Ayd. It was a far superior setup and I came to the conclusion that Jeff Gosling controls were outdated.