G'day Mate,
When you have been flying for 26 years, become an instructor, & flown pattern, & gliders, then I'll believe you.
Also I don't need to clean my motors, because I don't use Castor Oil in my fuel, I use synthetic, coolpower, & they don't get black crap on them.
But I will still check the capacity, of my battery packs, with a cycler, so my 160 size Katana, my 60 size Yak 54, & my 60 size Diabolo, stay in the air.