Skimmer for 14g Biocube that is HOB

I already purchased the biocube skimmer and just uninstalled it so I could add a media rack with phospguard filter floss and purigen.

As such, the skimer doesn't fit in chamber 1 anymore. Couple of questions:

1) can I make this an HOB skimmer?

2) Is there a better affordable alternative that I can use as an HOB without doing to many modifications to the tank (rather not use a dremel or something)

Thanks for the advice!