It requires years of planning.
Have you already prepped up your tree for the new budwoods?
About a year before the budwoods have arrived, what I usually do is prune off those terminals to encourage branching and work out the balancing act from there by removing unwanted limbs and selecting only those that are in the right orientation. By cutting off the terminal leader, you are forcing the tree to grow laterally, shortening it at the same time.
A 4-in-1 type is the easiest to do. It will be lopsided if you let the tree on its own after T-budding. Really you should expect a lopsided tree next year, but be excited about it, if I were you. Next months or next year, watch out which grafts will be more vigorous, you can either control its growth by pruning or wait it out and graft more varieties over some of the big branches of the vigorous cultivars. Approach this like you would prune a tree for balance, but instead of cutting off the disproportionate growers, T-bud over them strategically with the objective in mind of cutting them off for balance but new cultivars will sprout. Do this for several cycles, you will easily end up with a well balanced tree that could perhaps accomodate the entire citrus germplasm of UCR.