Felt seat reducers

Can affect the rider's pelvis tilt, refines the twist, and slightly deepens the seat. It goes under the front of the seat, with the wide side toward the pommel and the pointy side toward the rider. It can be moved forward/back for a greater effect.
Riders who have a low pelvic floor may not like the bolster. For those who are looking at the product to tilt the pelvis, one of the other rider balancing aids will have a great effect without discomfort.
To install, release the velcro under the front center of the seat, then tug the seat back over the front dees. Place the bolster and press the seat back into position, making sure all is still symmetrical. Replace the front velcro tab and push the seat back over the front dees. This last part can be difficult, especially when the saddle is new - to make it easier, pull some twine or a shoelace through the dee to give you more leverage.

Beveled wool felt shaped to fit the front of the Ghost panel. Two pieces per side, use the bigger one alone for a 1/4" lift, both together for a 1/2" lift. You can also shim one side more than the other if your horse has a bigger shoulder (shim the smaller shoulder).
To install, turn your saddle upside down on a level surface. Remove one panel only and open the velcro tab. Push one or both shims to the very front of the panel, close the velcro and reattach to the bottom of the saddle, using the stitch line of the base for positioning while comparing to the panel still in place. Repeat for the other panel.

If panel shims aren't enough or you have closed panels, it's also possible to shim in the pads (although the pocket shims for close panels may be a better option for both cases). You want to make sure you are still using the foam pad inserts so you don't put a transition next to the horse, plus they'll stay in place better.
One advantage of the pad shims is that they are easy to put in place while the saddle is on the horse (not girthed) and can easily be removed if one horse needs shims and another does not.

Short flap, angled block. Suitable for trail, casual arena, endurance. Can be used with just stirrup straps or with either english or western fenders. An alternative model is the Ferrara which has removable thigh blocks.
Learn about Saddle Extras here. See Color/Materials here.