When I do an up to front, I prefer to do it from pedaling straight to front rather than hopping off the rear wheel. Basicly, as your front wheel comes up, just before you put the main hop in, start moving your body weight forwards, you want to have your chest over the stem with your arms bent (like your trying to kiss the front wheel. Land with your wheel just above the edge and let the rear wheel come up....just before the wheel is at its highest, let go of the front brake and push the bars forwards, your wheel should land where the front was.