I've had an experience or 2 with the company you mentioned earlier wanting their stats removed. I ordered a chip & exhaust package earlier this year which after a month's hassling arrived. The exhaust was the wrong one, the company said it was because my manual Nav had an auto floor pan, Bullshit I reckon, more like, they sent the wrong model. 3 days later a new dump pipe arrived, same as the first. Company wanted to have it customised to fit, even though the exhaust rested on the chassis. I contacted a few mechanics down here, the local exhaust centre & Nissan & none of them had ever heard of a manual with an auto floor pan. I phd Company back, said how amazing it was that NO ONE I spoke to had ever heard this before & that the company had magic inside info no one else had. I got a refund. The chip was a disaster. It was meant to have been tuned to a spain built d40 stx but overrevved the engine after changing gears. They're both still in the mechanics showroom 2 mths on waiting to be picked up. I also bought a recovery kit that was minus the rated bow shackles that they've never sent out despite my contacting them on a number of occasions. When I spoke to the owner he promised to send them out along with an led bar for the inconvenience I'd encountered. Nup, never arrived. Lies lies & more lies. Since then I've installed a Steinbauer/beaudesert combo which I'm ok about, but would recommend anyone installing a chip & doing loads of dusty driving to check their MAF sensor, ours was filthy, probably had never been cleaned & that impacted on the fuel economy by prompting the engine to use more fuel. Just filled up today, 14.37lts/100kms (@2840kgs modded weight), so looking for an improvement on next fill.
