The first couple shaves using the 1/4 hollow Hart should have been relatively easy coming off the full hollow Dovo. Shaving technique is the same, regardless of the grind or size of the razor. Both razors will command zero pressure to be used. And, if anything, the 1/4 hollow razor should be MORE forgiving of improper technique than the full hollow.

Here's my two thoughts on the matter. First, your angle may be too steep with the Hart, try to flatten it out a bit. Second, of that doesn't work, the Hart likely isn't completely shave ready and needs some more time on the hones. Believe it or not, you are more likely to get cuts and burn from a dulling razor than an ultra sharp one.