I intend to expand the range, adding in more variation (particularly to the Grenz) filling some gaps (Ive a grenz drummer in field cap ready for moulding) and then adding in the cavalry - starting with 'old' hussar regiment and banat hussars. I am open to suggestions as to what to add.
Nice to see this range getting some attention

As a suggestion for the hussars, for the Imperial hussar regiments (who, being Hungarian, all sided with the revolution) the uniform and the armament was exactly the same as in the the Napoleonic wars (the carbine was converted for percussion, but otherwise the same weapon), which already has a wide range of these available. The only exception was the shako plume, which was a new, smaller model- if I were you, I'd simply do a replacement headset for the Perry plastics.
For the National Guard, yes there is a huge variety of uniforms, Steve Barber already has some of these, If I were you, I'd expand those into a full range (commander, banner, drummer, 3-4 soldier poses).