few words of advice:
- Try to get the right kind of screw for the material you are using, KREG do all kinds
- Use extraction, as it makes the drill bits last longer and you get a cleaner run
- Clamping is key, they must be solidly clamped
- When the two work pieces pull up, due to the angle then you will risk move the piece that you are screwing into pulling out of line. You can shim the clamp to allow for this, eg, you clamp out of line, then do the joint up and pull into line.
A good KREG kit isn't cheap, though it is £650 cheaper than a domino.........