VMA05 or KA05 use with shields

I notice this I/O/Relay shield doesn’t have pass through headers. However this spec says it’s compatible with other shields. The question is to what extent if it doesn’t pass through.

I want to sandwich this between an Arduino Uno and Adafruit 2 Line LCD with Buttons Shield. is this possible? is it possible if I pull the headers off and put on my own pass through headers? Will it work?

Yes you can ofcourse change these headers.
Just be aware some compatibilty issues can arise.

Best Regards,