I'm going to start putting things together now but I'm still puzzled by all these fuel tank positioning combinations. I find hard to decide but to be honest I'd loved to use what's in there. I understand, stock tanks can make it quite nose heavy but if we position our gear to make it, say, 35mm aft with uat full, main tanks empty and gear retracted, where will then GG end up if we now fill the main tanks? Maybe I should ask different way. If you are using stock tanks only (no smoke system) with the above settings, is there a significant difference between first and the second part of the flight? Do you have to trim the elevator quite a lot?