Hi, I have often thought that our 2014 Bessacarr 484 (Ducato 130 based) motorhome is a bit under powered and thirsty. Has anyone out there had any experience of digital tuning boxes fitted to a motorhome, like the ones sold by Chip Express -and others. There seem to be a lot on the market of varying prices with the same claims for increased power, torque and economy, but are any of them any good? And will they do any long-term harm to the engine? Cheers.