I have a holster for my TK but the leather needs some work as it's old, it didn't look so black anymore next to the glossyness of the TX! i did my TK approval without a holster at all as well. I do quite a few troops without weapons so only use it 50/50!
As for the build thread, well...I have some pics of progress but alot of my building was overshadowed by SWW...I will make a thread with what I have! I can give alot of advice, I built everything like my TK as both suits are ATA but did a few changes on this one.
I hope the approval will go okay as well, I know I would LOVE to show it off at CV with the 501st