Junior here. I'm all foundationless except for the frames that came with my first year nucs. Year one, 2011, with two nucs, was not that difficult. I kept using the original built out frames as guides. I was prety much prepared for the medium supers with no built out guides.
I use a grooved top bar frame, slat turned on side, glued and stapled. This year I'm using a small 3 x 1.5 patch of foundation stapled to my top bar, just to "sharpen the edge" that the bees cling to. My new packages really built those frames out fast,... and purty too.
As has been stated, talk to your bees. Most of them are willing to listen. They'll cut you some slack because you gave them a nice home.