Just don't underestimate the time and expense involved. I have now sold about 150 of the steering heads together with springs, AVO dampers, modified lower links and, more recently hydraulic steering dampers. Total cost of these items to the purchasers has been about £150k and as I sell them on a 'not for profit' basis that means that there has been a turn over of about £300k. Note that I did not have to spend that money all at once, it took over ten years, but if starters took off then you might be involved in a similar expense and time scale. It also consumes a large amount of time.