Hi I am looking for people's views and experiences with either of these tuning boxes I have a 2014 Leon fr 150 and have recently had a tdi tuning box fitted although the performance and fuel economy has greatly improved I had it on a rolling road the other week and was 15-20bhp down on the figures I was told so am thinking of swapping to a dtuk to see if they are any better so looking for anyone who runs a dtuk box to see if it's worth it , thanks