So I just bit the bullet and ordered the octavia LnK. Any advice on dtuk boxes would be greatly as surely I can get more power out of the engine without massive tuning costs.

Welcome. Enjoy the new car.

Best leave fitting the tuning box for at least 6 months / 6,500 miles until you see all is well with the car.

Maybe the Tuning Box will not invalidate your 3 year Manufacturers Warranty but you do want to know that all is well with the car.

Remap costs are not that much higher than a tuning box, there are places in or near Aberdeen.

That will invalidate the warranty though.