Not bad at all! Could you maybe hoist the Jetpack up a little higher on your back? Alternately, you could move the mounting points on the pack a little lower to achieve the same effect.
As as for the boot cuffs on the flight suit, as mentioned by crumdum... I took my flightsuit to a tailor with a print of the flightsuit pic from the 501 ESB Fett CRL. It has the calves taken in at the bottom, creating a conical, tapered look to the shins. My tailor was able to take them in (as well as my arms) to help create the slim shin look.