I've researched this about the insignia:
- The shoulder insignia show the rank of soldaar der eerste klasse (PFC)
- The sleeve insignia is that of the luchtmobiele brigade (this is an old one made from 1993 onwards, not sure when it was replaced)
- The patch on the breast is that of the opleidingscentrum voor initiële opleidingen for the luchtmobiele brigade. Basically a unit that schools the new recruits in the basics.
Overall I think you have done a good job. But I'm a bit in the dark about who would have worn the breast badge, I think it would be reserved for those who worked permanently at the unit (instructors and so on) a pfc would already have completed the course but a instructor would be a higher rank.
(dutch) source: http://legeremblemen.nl/