I have an X-30 and one of good buds surfs an X-45. So here is the real story!
1st a MC can handle balanced weight from stern to bow just fine. And a lot of it too! The X-45 needs plenty of weight to get the hull deeper into the water, and will put out the very best surf wake you will ever see any where on the lake. Adding lots of weight will require more skilled driving from you and with weight in the bow you will have to maneuver without flooding the bow. Surfing the Port side will require right turns only to avoid hitting the wave on the turn to pick up the rider. NO LEFT TURNS!!!!
We both have Fly High Fat Sacs plumbed in the rear lockers tied into the existing ballast pumps. I also use stand alone ballast bags in the bow and move them depending on how many people we have in the boat.
The most essential weight component comes from the pop bags we use (40lbs steel shot). Look for pop-products online! I have 800lbs total and spread the bags throughout the boat to fine tune the shape and length of the wave.
Next, learn to dial in your trim plate. If you only have weight in the back apply a little more trim to bring the bow more planed and that will lengthen out the wave.
Make sure you have the speed dialed in for the most crisp wake depending on how much weight you have added. Also experiment and try lots of different weight combinations!
Remember that stern weight makes for a steep wave and bow weight helps to create a longer wave. When you have the X-45 deep in the water from nose to tail you create an amazing wave that you can surf way back and also have the vertical face for a fast ride.
Nothing beats the MASTERCRAFT! So enjoy the upcoming season and please email me if you have any more questions: firstname.lastname@example.org