No roller, Wot. The bar running at an angle from the bow eye to the trailer is hinged down at the base. Disconnect the winch strap hook from the bow eye & the bar will lay flat forward for unloading. For loading, drive the boat up (winch into position if necessary), raise the bar, & clip the strap hook to lock it all in place. Honestly, I only did this twice before starting the rebuild. Worked pretty good both times, but I can see an issue in getting it properly located fore/aft so the slot in the top of the bar slips over the bow eye. I'm thinking of marking the keel at the vee bunk for reference.
Maple - steering's already aligned. New rotary helm (with tilt), steering cable, steering tube, clamp block, & rudder. After the rudder is in, leave the steering cable disconnected from the tiller arm. Loosen the clamp block so the steering tube can slide back & forth. Rotate the steering wheel lock to lock & measure the travel of the steering cable shaft where it exits the steering tube. Mark the center of travel on the cable shaft & rotate the steering wheel to the center point of travel. Align the rudder straight & slide the steering tube in the clamp block until you can attach the steering cable shaft to the tiller arm while the rudder is straight and the cable shaft travel is centered. Tighten the clamp block on the steering tube. You may need to remove & reinstall the steering wheel to be centered now that everything's aligned. Good luck this weekend.
I can tell you from prying, leveraging, & muscling that BB & trans into position - it weighs a lot more than 22 carats, but yeah it's all sparkly :) Hopefully she'll run as good as she looks.