just drop by, iafm+ unit sound insulation is not as cfe unit, hence, the whining, even when lift off throttle, can hear a bit, but really slow, while cfe has better sound insulation, the slow whinning when off throttle is almost muted.

About adding or chnaging twetter, my friend said that if can, dont do that coz any tempering of wire can void warranty. Some cases even can cause firing. Preve equip with many electronics stuff that intergrated using bcm which is highly sensitive. Better as sc first before doing any mod.

About the fan spinning, for other(campro based abd renault based) than cfe, it will spin if its hot, but rarely even if u shut off the engine. For cfe,also not that always, but it comes with the feature,but of course, cfe is hotter though .When go for 1st service, ask them to check the coolant level(reservoir) and coolant circulation whether the reserve is on max and its runs properly.

Sat on iafm+ 6 speed, on cfe, 7 speed but in preve since comes with manual mode which actually same as sat, diff only u can control its manually compared to bold cfe.