They sell "marriage" adjustment tools in the market..

depending you the amount of adjustment you need to make..

the adjustment tools come in 2, 4,6 and 8 pounds...

to properly adjust, you start first with a 8 pound tool, to bring the unit far from center, then use the 4 or 6 pound tool for the course adjustment, followed up by the 2 pound tool for fine adjustments..
remember to you will need to keep fine tuning to keep the marrige happy and finely tuned..

lol