Just installed DNA stage 1 & 2 filters and Kev fuel mod yesterday
I did short test run and tried to find good setting for fuel mod - Kev's instructions say to use 4-7 o'clock position. First tried a bit over 4, then almost 7 and stick to that. Cant say major difference, but it just felt better.
First impressions of mods: LOUD, with LeoVince X3 and also snorkel removed

. Feels like more power especially on higher revs (I found myself reving it way more up than before on acceleration, because it felt like no need to get those low rew horses from bigger gears). And most importantly - almost no surging at all anymore!
Being such skeptical individual, I have small worries still- Can I be sure I installed fuel mod correctly? Yes installation is really for dummies so not much that can be done wrong... But anyway, how to know fuel mod is working properly and my bike is not running lean? If fuel mod is not connected ok, does bike start at all, run badly with filter mods, or even give some diagnostic errors?
Another dumb question - How does stage 2 airbox cover filter manages when washing my bike? Should I cover it, or does it hold water so I can was my bike normally?