Just got my trust from Rose this week (highly recommend!. I am filling out a form 1 for the first time to convert an AK pistol to a SBR. For a lot of my questions I found a thread here with answers. My main question I still have is 4f, overall length of firearm. Is that the current length or the length once it is an SBR? Since I don't have a stock for it is it ok to estimate if it is the latter? Also a little concerned about 4i, reason. I put "For my collection and all lawful uses." Does it matter?

Thanks in advance, nfa noob.