Can anyone help. I have a slight twist in a mal and I was wondering if had any ideas about how i can get it out. Any constructive suggestions would be appreciated.... Thanks

the board was about custom made about 6-7 years ago and is in good condition except for the twist

Many years ago I had a donated prize longboard that had a twist. I believe the twist came when the board wasn't stored properly. I have heard to leave them in the sun with weights/bricks all over them to try and get the twist out. Don't know if it works or not.

I was a distributor for a blank manufacturer for most of the nineties, it has happened before and is usually due the stringer wood not being fully cured/dried before shaping and glassing. Most shapers have very good eyes for curves and can pick the flaw before shaping, which is when they would call me. However, I have come across this occurring post shaping and before glassing and we traced it back to a bad batch of stringer sheets that were 'green' and not kiln dried properly before laminating, glueing and pressing.
When I did on the one occasion see a new board with the 'twist' you describe, fresh after glassing, we covered all costs and replaced the materials.
If, as you write, the board is some years old, the best method is to ty to straighten it via Sean's methods described above as it does work. Have plenty of weights like dumbell weights as you can adjust the weight distribution, from light at the start of the twist, to heavy at the very max of it.
Good luck, the board will never be the same again and if it was a favourite.. time to rack it before you get pissed off and jump on it.
(Good luck Big Sean with the Malfunction, I hope Huey smiles.)