I can see how people would get upset for adding things to their order and bumping the price, you should leave it as it is. I also know that you are trying to avoid more separate kits which can mean headache....
But the kit 9 has no connection between the keys my brother, you have 3 different types of kits in kit 9...
Kit 1 (Blanks)
- 1x 1.75u DSA GX Stepped Capslock - Left Stem blank
- 1x 1.75u DSA GX Stepped Capslock - Left Stem blank w/ led window
- 1x 1.75u DSA GX full touch blank off side stem Capslock
Kit 2 (Legends)
- 1x 1.75u DSA GX Stepped CAPS LOCK - Left Stem with legends
- 1x 1.75u DSA GX Stepped CTRL - Left Stem with legends
- 1x 1.75u DSA GX Stepped SHIFT LOCK - Left Stem with legends
Kit 3 (odd size spacebars)
- 1x 6u DSA GE Spacebar
- 1x 6u DCS GE Spacebar
EDIT: Have you considered that your ISO kit is missing bunch of language packs? you only have the typical Eng ISO pack, try adding language packs to it and see how more people will join, ISO sells good only when broader option of language pack is added.