This is not the ideal way to go about it. But since you're in this predicament, here goes for the two main fit areas of concern.
(1) With respect to heel fit, I'll repeat what I wrote in your first thread:
The key fitting parameter for a figure skate boot is proper heel lock: the heel of your foot should be held in the heel pocket of the boot firmly and snugly (but you should not feel pinching or pain). After you lace up, stand up and have someone else hold your boot down firmly against the floor (that person should grasp the boot by the periphery of the outsole and by the external heel, not by the uppers). Then try deliberately to move the heel of your foot within the boot. The heel should not move up/down, forward/backward, or side/side. This should all be done with the boot as-is, and while you are wearing thin socks (or tights). No thick socks, no squishy fillers.
(2) With respect to fit in the toe box:
With a brand-new boot, properly fitting, you should be able to wiggle your toes freely. When doing so, the tips of your toes should brush lightly across the lining. As you break-in the boot, the lining will compress, and there will be more clearance. But the boot should not exert pressure against your toes, and your toes should not feel cramped.
