Report "Putting together sidearm 594xt. Instructions don't tell which SIZE carriage bolts to use at any point in the instructions. I'm afraid I'll get to the end and need the short ones I installed first. Also. the instructions that read to install one carriage bolt into two washer plates. Does that really mean one bolt in 2 plates, or does it actually mean install one bolt into one plate and another into the other? Do you slide them both into the same end of the tray? Thanks for your help"