What's to set up? there are 3 spring tension settings
When you think about it, there is only 85mm of travel, so if you are bottoming out you only have one course of action n that's to increase spring tension, for me at 15 stone, to have them not bottoming out they are really stiff.
There really is nothing you can do except increase the travel which of course you can't do, but, when you take the spring off there is a rubber cushion around the shaft about 20mm tall, this is the cushion for when the shocks bottom out, seeing as I don't feel any cushion effect at all, ie, when the shocks bottom out the feeling is akin to being bucked by a horse, zilch cushion, so, with nothing to lose I cut 10mm off my cushions so I get an extra 10mm of travel, this is not a fix but it does eliminate "some" bottoming out.
The heavier the rider the worse the situation. What's needed is more travel, I dunno if you can get shocks with more travel at the height required but 85mm is just nothing and although I haven't actually measured the travel, 85mm is what the Hagon guy said was stock for these bikes, either way, it's not enough n I don't remember having this drama when I was a 10 stone monster.