A lot of the potential adjustments can't be made cheaply to a set that you've already purchased. Eg: shorter or longer shafts (may reuire a different weight head), right type and flex of shaft, grip type and thickness. All these are adjsutments that could prove costly.
Lie angle can be adjusted by upto 2 degrees, but this is only one of many factors.
If you want to know for sure, it might be wise to start from scratch and visit one of our National Centres with a clean sheet.