Thaihunter, when you make a tiller tree it's best to make one that holds the bow where your hand will be on the bow and most importantly the string is drawn from the same position where you will draw the bow from. I don't like tiller sticks as the bow is placed centre of the stick and pulled down from the centre of the tiller stick, which defeats the purpose because when you draw the bow from your normal shooting position which will be different because it is not physical possible to shoot a bow from that position you will pull the bow out of tiller straight away.
The tiller tree will allow to replicate the bow hand position and the drawing position and see the true tiller of the bow when you draw it...Glenn...